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cciss: Fix usage_count check in rebuild_lun_table when triggered via sysfs.
[net-next-2.6.git] / drivers / block / cciss.c
CommitLineData
1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to iss_storagedev@hp.com
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
27#include <linux/kernel.h>
28#include <linux/slab.h>
405f5571 29#include <linux/smp_lock.h>
1da177e4
LT		 30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1da177e4
LT		 44#include <asm/uaccess.h>
45#include <asm/io.h>
46
eb0df996 47#include <linux/dma-mapping.h>
1da177e4
LT		 48#include <linux/blkdev.h>
49#include <linux/genhd.h>
50#include <linux/completion.h>
d5d3b736 51#include <scsi/scsi.h>
03bbfee5
MMOD		 52#include <scsi/sg.h>
53#include <scsi/scsi_ioctl.h>
54#include <linux/cdrom.h>
231bc2a2 55#include <linux/scatterlist.h>
0a9279cc 56#include <linux/kthread.h>
1da177e4
LT		 57
58#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
24aac480
MM		 59#define DRIVER_NAME "HP CISS Driver (v 3.6.20)"
60#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 20)
1da177e4
LT		 61
62/* Embedded module documentation macros - see modules.h */
63MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 64MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
1da177e4 65MODULE_SUPPORTED_DEVICE("HP SA5i SA5i+ SA532 SA5300 SA5312 SA641 SA642 SA6400"
24aac480
MM		 66 " SA6i P600 P800 P400 P400i E200 E200i E500 P700m"
67 " Smart Array G2 Series SAS/SATA Controllers");
68MODULE_VERSION("3.6.20");
1da177e4
LT		 69MODULE_LICENSE("GPL");
70
71#include "cciss_cmd.h"
72#include "cciss.h"
73#include <linux/cciss_ioctl.h>
74
75/* define the PCI info for the cards we can control */
76static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 77 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
78 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
79 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
80 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
81 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
82 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
83 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
84 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
85 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
86 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
87 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
88 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
89 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
90 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
91 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
92 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
93 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
94 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 95 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 96 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
24aac480
MM		 97 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3241},
98 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3243},
99 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3245},
100 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3247},
101 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x3249},
77ca7286
MM		 102 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324A},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSE, 0x103C, 0x324B},
4ff9a9a4
MM		 104 {PCI_VENDOR_ID_HP, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
105 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
1da177e4
LT		 106 {0,}
107};
7c832835 108
1da177e4
LT		 109MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
110
1da177e4
LT		 111/* board_id = Subsystem Device ID & Vendor ID
112 * product = Marketing Name for the board
7c832835 113 * access = Address of the struct of function pointers
1da177e4
LT		 114 */
115static struct board_type products[] = {
49153998
MM		 116 {0x40700E11, "Smart Array 5300", &SA5_access},
117 {0x40800E11, "Smart Array 5i", &SA5B_access},
118 {0x40820E11, "Smart Array 532", &SA5B_access},
119 {0x40830E11, "Smart Array 5312", &SA5B_access},
120 {0x409A0E11, "Smart Array 641", &SA5_access},
121 {0x409B0E11, "Smart Array 642", &SA5_access},
122 {0x409C0E11, "Smart Array 6400", &SA5_access},
123 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
124 {0x40910E11, "Smart Array 6i", &SA5_access},
125 {0x3225103C, "Smart Array P600", &SA5_access},
126 {0x3223103C, "Smart Array P800", &SA5_access},
127 {0x3234103C, "Smart Array P400", &SA5_access},
128 {0x3235103C, "Smart Array P400i", &SA5_access},
129 {0x3211103C, "Smart Array E200i", &SA5_access},
130 {0x3212103C, "Smart Array E200", &SA5_access},
131 {0x3213103C, "Smart Array E200i", &SA5_access},
132 {0x3214103C, "Smart Array E200i", &SA5_access},
133 {0x3215103C, "Smart Array E200i", &SA5_access},
134 {0x3237103C, "Smart Array E500", &SA5_access},
135 {0x323D103C, "Smart Array P700m", &SA5_access},
136 {0x3241103C, "Smart Array P212", &SA5_access},
137 {0x3243103C, "Smart Array P410", &SA5_access},
138 {0x3245103C, "Smart Array P410i", &SA5_access},
139 {0x3247103C, "Smart Array P411", &SA5_access},
140 {0x3249103C, "Smart Array P812", &SA5_access},
77ca7286
MM		 141 {0x324A103C, "Smart Array P712m", &SA5_access},
142 {0x324B103C, "Smart Array P711m", &SA5_access},
49153998 143 {0xFFFF103C, "Unknown Smart Array", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
7d12e780 165static irqreturn_t do_cciss_intr(int irq, void *dev_id);
ef7822c2
AV		 166static int cciss_open(struct block_device *bdev, fmode_t mode);
167static int cciss_release(struct gendisk *disk, fmode_t mode);
168static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 169 unsigned int cmd, unsigned long arg);
a885c8c4 170static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 171
1da177e4 172static int cciss_revalidate(struct gendisk *disk);
2d11d993 173static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 174static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 175 int clear_all, int via_ioctl);
1da177e4 176
00988a35
MMOD		 177static void cciss_read_capacity(int ctlr, int logvol, int withirq,
178 sector_t *total_size, unsigned int *block_size);
179static void cciss_read_capacity_16(int ctlr, int logvol, int withirq,
180 sector_t *total_size, unsigned int *block_size);
181static void cciss_geometry_inquiry(int ctlr, int logvol,
182 int withirq, sector_t total_size,
183 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 184 drive_info_struct *drv);
7c832835
BH		 185static void __devinit cciss_interrupt_mode(ctlr_info_t *, struct pci_dev *,
186 __u32);
187static void start_io(ctlr_info_t *h);
188static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
7c832835
BH		 189 __u8 page_code, unsigned char *scsi3addr, int cmd_type);
190static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
33079b21 197static void fail_all_cmds(unsigned long ctlr);
d6f4965d 198static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 199static int scan_thread(void *data);
200static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 201static void cciss_hba_release(struct device *dev);
202static void cciss_device_release(struct device *dev);
361e9b07 203static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
33079b21 204
1da177e4 205#ifdef CONFIG_PROC_FS
1da177e4
LT		 206static void cciss_procinit(int i);
207#else
7c832835
BH		 208static void cciss_procinit(int i)
209{
210}
211#endif /* CONFIG_PROC_FS */
1da177e4
LT		 212
213#ifdef CONFIG_COMPAT
ef7822c2
AV		 214static int cciss_compat_ioctl(struct block_device *, fmode_t,
215 unsigned, unsigned long);
1da177e4
LT		 216#endif
217
83d5cde4 218static const struct block_device_operations cciss_fops = {
7c832835 219 .owner = THIS_MODULE,
ef7822c2
AV		 220 .open = cciss_open,
221 .release = cciss_release,
222 .locked_ioctl = cciss_ioctl,
7c832835 223 .getgeo = cciss_getgeo,
1da177e4 224#ifdef CONFIG_COMPAT
ef7822c2 225 .compat_ioctl = cciss_compat_ioctl,
1da177e4 226#endif
7c832835 227 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 228};
229
230/*
231 * Enqueuing and dequeuing functions for cmdlists.
232 */
8a3173de 233static inline void addQ(struct hlist_head *list, CommandList_struct *c)
1da177e4 234{
8a3173de 235 hlist_add_head(&c->list, list);
1da177e4
LT		 236}
237
8a3173de 238static inline void removeQ(CommandList_struct *c)
1da177e4 239{
b59e64d0
HR		 240 /*
241 * After kexec/dump some commands might still
242 * be in flight, which the firmware will try
243 * to complete. Resetting the firmware doesn't work
244 * with old fw revisions, so we have to mark
245 * them off as 'stale' to prevent the driver from
246 * falling over.
247 */
248 if (WARN_ON(hlist_unhashed(&c->list))) {
249 c->cmd_type = CMD_MSG_STALE;
8a3173de 250 return;
b59e64d0 251 }
8a3173de
JA		 252
253 hlist_del_init(&c->list);
1da177e4
LT		 254}
255
256#include "cciss_scsi.c" /* For SCSI tape support */
257
0f5486ec
RD		 258#define RAID_UNKNOWN 6
259
1da177e4
LT		 260#ifdef CONFIG_PROC_FS
261
262/*
263 * Report information about this controller.
264 */
265#define ENG_GIG 1000000000
266#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 267#define ENGAGE_SCSI "engage scsi"
7c832835
BH		 268static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
269 "UNKNOWN"
270};
1da177e4
LT		 271
272static struct proc_dir_entry *proc_cciss;
273
89b6e743 274static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 275{
89b6e743
MM		 276 ctlr_info_t *h = seq->private;
277
278 seq_printf(seq, "%s: HP %s Controller\n"
279 "Board ID: 0x%08lx\n"
280 "Firmware Version: %c%c%c%c\n"
281 "IRQ: %d\n"
282 "Logical drives: %d\n"
283 "Current Q depth: %d\n"
284 "Current # commands on controller: %d\n"
285 "Max Q depth since init: %d\n"
286 "Max # commands on controller since init: %d\n"
287 "Max SG entries since init: %d\n",
288 h->devname,
289 h->product_name,
290 (unsigned long)h->board_id,
291 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
292 h->firm_ver[3], (unsigned int)h->intr[SIMPLE_MODE_INT],
293 h->num_luns,
294 h->Qdepth, h->commands_outstanding,
295 h->maxQsinceinit, h->max_outstanding, h->maxSG);
296
297#ifdef CONFIG_CISS_SCSI_TAPE
298 cciss_seq_tape_report(seq, h->ctlr);
299#endif /* CONFIG_CISS_SCSI_TAPE */
300}
1da177e4 301
89b6e743
MM		 302static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
303{
304 ctlr_info_t *h = seq->private;
305 unsigned ctlr = h->ctlr;
306 unsigned long flags;
1da177e4
LT		 307
308 /* prevent displaying bogus info during configuration
309 * or deconfiguration of a logical volume
310 */
311 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
312 if (h->busy_configuring) {
313 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
89b6e743 314 return ERR_PTR(-EBUSY);
1da177e4
LT		 315 }
316 h->busy_configuring = 1;
317 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
318
89b6e743
MM		 319 if (*pos == 0)
320 cciss_seq_show_header(seq);
321
322 return pos;
323}
324
325static int cciss_seq_show(struct seq_file *seq, void *v)
326{
327 sector_t vol_sz, vol_sz_frac;
328 ctlr_info_t *h = seq->private;
329 unsigned ctlr = h->ctlr;
330 loff_t *pos = v;
331 drive_info_struct *drv = &h->drv[*pos];
332
333 if (*pos > h->highest_lun)
334 return 0;
335
336 if (drv->heads == 0)
337 return 0;
338
339 vol_sz = drv->nr_blocks;
340 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
341 vol_sz_frac *= 100;
342 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
343
344 if (drv->raid_level > 5)
345 drv->raid_level = RAID_UNKNOWN;
346 seq_printf(seq, "cciss/c%dd%d:"
347 "\t%4u.%02uGB\tRAID %s\n",
348 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
349 raid_label[drv->raid_level]);
350 return 0;
351}
352
353static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
354{
355 ctlr_info_t *h = seq->private;
356
357 if (*pos > h->highest_lun)
358 return NULL;
359 *pos += 1;
360
361 return pos;
362}
363
364static void cciss_seq_stop(struct seq_file *seq, void *v)
365{
366 ctlr_info_t *h = seq->private;
367
368 /* Only reset h->busy_configuring if we succeeded in setting
369 * it during cciss_seq_start. */
370 if (v == ERR_PTR(-EBUSY))
371 return;
7c832835 372
1da177e4 373 h->busy_configuring = 0;
1da177e4
LT		 374}
375
88e9d34c 376static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 377 .start = cciss_seq_start,
378 .show = cciss_seq_show,
379 .next = cciss_seq_next,
380 .stop = cciss_seq_stop,
381};
382
383static int cciss_seq_open(struct inode *inode, struct file *file)
384{
385 int ret = seq_open(file, &cciss_seq_ops);
386 struct seq_file *seq = file->private_data;
387
388 if (!ret)
389 seq->private = PDE(inode)->data;
390
391 return ret;
392}
393
394static ssize_t
395cciss_proc_write(struct file *file, const char __user *buf,
396 size_t length, loff_t *ppos)
1da177e4 397{
89b6e743
MM		 398 int err;
399 char *buffer;
400
401#ifndef CONFIG_CISS_SCSI_TAPE
402 return -EINVAL;
1da177e4
LT		 403#endif
404
89b6e743 405 if (!buf || length > PAGE_SIZE - 1)
7c832835 406 return -EINVAL;
89b6e743
MM		 407
408 buffer = (char *)__get_free_page(GFP_KERNEL);
409 if (!buffer)
410 return -ENOMEM;
411
412 err = -EFAULT;
413 if (copy_from_user(buffer, buf, length))
414 goto out;
415 buffer[length] = '\0';
416
417#ifdef CONFIG_CISS_SCSI_TAPE
418 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
419 struct seq_file *seq = file->private_data;
420 ctlr_info_t *h = seq->private;
421 int rc;
422
7c832835
BH		 423 rc = cciss_engage_scsi(h->ctlr);
424 if (rc != 0)
89b6e743
MM		 425 err = -rc;
426 else
427 err = length;
428 } else
429#endif /* CONFIG_CISS_SCSI_TAPE */
430 err = -EINVAL;
7c832835
BH		 431 /* might be nice to have "disengage" too, but it's not
432 safely possible. (only 1 module use count, lock issues.) */
89b6e743
MM		 433
434out:
435 free_page((unsigned long)buffer);
436 return err;
1da177e4
LT		 437}
438
89b6e743
MM		 439static struct file_operations cciss_proc_fops = {
440 .owner = THIS_MODULE,
441 .open = cciss_seq_open,
442 .read = seq_read,
443 .llseek = seq_lseek,
444 .release = seq_release,
445 .write = cciss_proc_write,
446};
447
1da177e4
LT		 448static void __devinit cciss_procinit(int i)
449{
450 struct proc_dir_entry *pde;
451
89b6e743 452 if (proc_cciss == NULL)
928b4d8c 453 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 454 if (!proc_cciss)
455 return;
3dfcf9c4 456 pde = proc_create_data(hba[i]->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 457 S_IROTH, proc_cciss,
3dfcf9c4 458 &cciss_proc_fops, hba[i]);
1da177e4 459}
7c832835 460#endif /* CONFIG_PROC_FS */
1da177e4 461
7fe06326
AP		 462#define MAX_PRODUCT_NAME_LEN 19
463
464#define to_hba(n) container_of(n, struct ctlr_info, dev)
7fe06326 465
d6f4965d
AP		 466static ssize_t host_store_rescan(struct device *dev,
467 struct device_attribute *attr,
468 const char *buf, size_t count)
469{
470 struct ctlr_info *h = to_hba(dev);
471
472 add_to_scan_list(h);
473 wake_up_process(cciss_scan_thread);
474 wait_for_completion_interruptible(&h->scan_wait);
475
476 return count;
477}
478DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326
AP		 479
480static ssize_t dev_show_unique_id(struct device *dev,
481 struct device_attribute *attr,
482 char *buf)
483{
617e1344
SC		 484 drive_info_struct *drv = dev_get_drvdata(dev);
485 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 486 __u8 sn[16];
487 unsigned long flags;
488 int ret = 0;
489
490 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
491 if (h->busy_configuring)
492 ret = -EBUSY;
493 else
494 memcpy(sn, drv->serial_no, sizeof(sn));
495 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
496
497 if (ret)
498 return ret;
499 else
500 return snprintf(buf, 16 * 2 + 2,
501 "%02X%02X%02X%02X%02X%02X%02X%02X"
502 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
503 sn[0], sn[1], sn[2], sn[3],
504 sn[4], sn[5], sn[6], sn[7],
505 sn[8], sn[9], sn[10], sn[11],
506 sn[12], sn[13], sn[14], sn[15]);
507}
508DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
509
510static ssize_t dev_show_vendor(struct device *dev,
511 struct device_attribute *attr,
512 char *buf)
513{
617e1344
SC		 514 drive_info_struct *drv = dev_get_drvdata(dev);
515 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 516 char vendor[VENDOR_LEN + 1];
517 unsigned long flags;
518 int ret = 0;
519
520 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
521 if (h->busy_configuring)
522 ret = -EBUSY;
523 else
524 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
525 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
526
527 if (ret)
528 return ret;
529 else
530 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
531}
532DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
533
534static ssize_t dev_show_model(struct device *dev,
535 struct device_attribute *attr,
536 char *buf)
537{
617e1344
SC		 538 drive_info_struct *drv = dev_get_drvdata(dev);
539 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 540 char model[MODEL_LEN + 1];
541 unsigned long flags;
542 int ret = 0;
543
544 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
545 if (h->busy_configuring)
546 ret = -EBUSY;
547 else
548 memcpy(model, drv->model, MODEL_LEN + 1);
549 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
550
551 if (ret)
552 return ret;
553 else
554 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
555}
556DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
557
558static ssize_t dev_show_rev(struct device *dev,
559 struct device_attribute *attr,
560 char *buf)
561{
617e1344
SC		 562 drive_info_struct *drv = dev_get_drvdata(dev);
563 struct ctlr_info *h = to_hba(drv->dev->parent);
7fe06326
AP		 564 char rev[REV_LEN + 1];
565 unsigned long flags;
566 int ret = 0;
567
568 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
569 if (h->busy_configuring)
570 ret = -EBUSY;
571 else
572 memcpy(rev, drv->rev, REV_LEN + 1);
573 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
574
575 if (ret)
576 return ret;
577 else
578 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
579}
580DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
581
d6f4965d
AP		 582static struct attribute *cciss_host_attrs[] = {
583 &dev_attr_rescan.attr,
584 NULL
585};
586
587static struct attribute_group cciss_host_attr_group = {
588 .attrs = cciss_host_attrs,
589};
590
591static struct attribute_group *cciss_host_attr_groups[] = {
592 &cciss_host_attr_group,
593 NULL
594};
595
596static struct device_type cciss_host_type = {
597 .name = "cciss_host",
598 .groups = cciss_host_attr_groups,
617e1344 599 .release = cciss_hba_release,
d6f4965d
AP		 600};
601
7fe06326
AP		 602static struct attribute *cciss_dev_attrs[] = {
603 &dev_attr_unique_id.attr,
604 &dev_attr_model.attr,
605 &dev_attr_vendor.attr,
606 &dev_attr_rev.attr,
607 NULL
608};
609
610static struct attribute_group cciss_dev_attr_group = {
611 .attrs = cciss_dev_attrs,
612};
613
a4dbd674 614static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 615 &cciss_dev_attr_group,
616 NULL
617};
618
619static struct device_type cciss_dev_type = {
620 .name = "cciss_device",
621 .groups = cciss_dev_attr_groups,
617e1344 622 .release = cciss_device_release,
7fe06326
AP		 623};
624
625static struct bus_type cciss_bus_type = {
626 .name = "cciss",
627};
628
617e1344
SC		 629/*
630 * cciss_hba_release is called when the reference count
631 * of h->dev goes to zero.
632 */
633static void cciss_hba_release(struct device *dev)
634{
635 /*
636 * nothing to do, but need this to avoid a warning
637 * about not having a release handler from lib/kref.c.
638 */
639}
7fe06326
AP		 640
641/*
642 * Initialize sysfs entry for each controller. This sets up and registers
643 * the 'cciss#' directory for each individual controller under
644 * /sys/bus/pci/devices/<dev>/.
645 */
646static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
647{
648 device_initialize(&h->dev);
649 h->dev.type = &cciss_host_type;
650 h->dev.bus = &cciss_bus_type;
651 dev_set_name(&h->dev, "%s", h->devname);
652 h->dev.parent = &h->pdev->dev;
653
654 return device_add(&h->dev);
655}
656
657/*
658 * Remove sysfs entries for an hba.
659 */
660static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
661{
662 device_del(&h->dev);
617e1344
SC		 663 put_device(&h->dev); /* final put. */
664}
665
666/* cciss_device_release is called when the reference count
667 * of h->drv[x].dev goes to zero.
668 */
669static void cciss_device_release(struct device *dev)
670{
671 kfree(dev);
7fe06326
AP		 672}
673
674/*
675 * Initialize sysfs for each logical drive. This sets up and registers
676 * the 'c#d#' directory for each individual logical drive under
677 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
678 * /sys/block/cciss!c#d# to this entry.
679 */
617e1344 680static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 681 int drv_index)
682{
617e1344
SC		 683 struct device *dev;
684
8ce51966
SC		 685 /* Special case for c*d0, we only create it once. */
686 if (drv_index == 0 && h->drv[drv_index].dev != NULL)
687 return 0;
688
617e1344
SC		 689 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
690 if (!dev)
691 return -ENOMEM;
692 device_initialize(dev);
693 dev->type = &cciss_dev_type;
694 dev->bus = &cciss_bus_type;
695 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
696 dev->parent = &h->dev;
697 h->drv[drv_index].dev = dev;
698 dev_set_drvdata(dev, &h->drv[drv_index]);
699 return device_add(dev);
7fe06326
AP		 700}
701
702/*
703 * Remove sysfs entries for a logical drive.
704 */
8ce51966
SC		 705static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
706 int ctlr_exiting)
7fe06326 707{
617e1344 708 struct device *dev = h->drv[drv_index].dev;
8ce51966
SC		 709
710 /* special case for c*d0, we only destroy it on controller exit */
711 if (drv_index == 0 && !ctlr_exiting)
712 return;
713
617e1344
SC		 714 device_del(dev);
715 put_device(dev); /* the "final" put. */
716 h->drv[drv_index].dev = NULL;
7fe06326
AP		 717}
718
7c832835
BH		 719/*
720 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 721 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
7c832835
BH		 722 * which ones are free or in use. For operations that can wait for kmalloc
723 * to possible sleep, this routine can be called with get_from_pool set to 0.
724 * cmd_free() MUST be called with a got_from_pool set to 0 if cmd_alloc was.
725 */
726static CommandList_struct *cmd_alloc(ctlr_info_t *h, int get_from_pool)
1da177e4
LT		 727{
728 CommandList_struct *c;
7c832835 729 int i;
1da177e4
LT		 730 u64bit temp64;
731 dma_addr_t cmd_dma_handle, err_dma_handle;
732
7c832835
BH		 733 if (!get_from_pool) {
734 c = (CommandList_struct *) pci_alloc_consistent(h->pdev,
735 sizeof(CommandList_struct), &cmd_dma_handle);
736 if (c == NULL)
737 return NULL;
1da177e4
LT		 738 memset(c, 0, sizeof(CommandList_struct));
739
33079b21
MM		 740 c->cmdindex = -1;
741
7c832835
BH		 742 c->err_info = (ErrorInfo_struct *)
743 pci_alloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
744 &err_dma_handle);
745
746 if (c->err_info == NULL) {
747 pci_free_consistent(h->pdev,
1da177e4
LT		 748 sizeof(CommandList_struct), c, cmd_dma_handle);
749 return NULL;
750 }
751 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 752 } else { /* get it out of the controllers pool */
753
754 do {
f880632f
MM		 755 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
756 if (i == h->nr_cmds)
7c832835
BH		 757 return NULL;
758 } while (test_and_set_bit
759 (i & (BITS_PER_LONG - 1),
760 h->cmd_pool_bits + (i / BITS_PER_LONG)) != 0);
1da177e4
LT		 761#ifdef CCISS_DEBUG
762 printk(KERN_DEBUG "cciss: using command buffer %d\n", i);
763#endif
7c832835 764 c = h->cmd_pool + i;
1da177e4 765 memset(c, 0, sizeof(CommandList_struct));
7c832835
BH		 766 cmd_dma_handle = h->cmd_pool_dhandle
767 + i * sizeof(CommandList_struct);
1da177e4
LT		 768 c->err_info = h->errinfo_pool + i;
769 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
7c832835
BH		 770 err_dma_handle = h->errinfo_pool_dhandle
771 + i * sizeof(ErrorInfo_struct);
772 h->nr_allocs++;
33079b21
MM		 773
774 c->cmdindex = i;
7c832835 775 }
1da177e4 776
8a3173de 777 INIT_HLIST_NODE(&c->list);
1da177e4 778 c->busaddr = (__u32) cmd_dma_handle;
7c832835 779 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 780 c->ErrDesc.Addr.lower = temp64.val32.lower;
781 c->ErrDesc.Addr.upper = temp64.val32.upper;
782 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 783
7c832835
BH		 784 c->ctlr = h->ctlr;
785 return c;
1da177e4
LT		 786}
787
7c832835
BH		 788/*
789 * Frees a command block that was previously allocated with cmd_alloc().
1da177e4
LT		 790 */
791static void cmd_free(ctlr_info_t *h, CommandList_struct *c, int got_from_pool)
792{
793 int i;
794 u64bit temp64;
795
7c832835 796 if (!got_from_pool) {
1da177e4
LT		 797 temp64.val32.lower = c->ErrDesc.Addr.lower;
798 temp64.val32.upper = c->ErrDesc.Addr.upper;
7c832835
BH		 799 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
800 c->err_info, (dma_addr_t) temp64.val);
801 pci_free_consistent(h->pdev, sizeof(CommandList_struct),
802 c, (dma_addr_t) c->busaddr);
803 } else {
1da177e4 804 i = c - h->cmd_pool;
7c832835
BH		 805 clear_bit(i & (BITS_PER_LONG - 1),
806 h->cmd_pool_bits + (i / BITS_PER_LONG));
807 h->nr_frees++;
808 }
1da177e4
LT		 809}
810
811static inline ctlr_info_t *get_host(struct gendisk *disk)
812{
7c832835 813 return disk->queue->queuedata;
1da177e4
LT		 814}
815
816static inline drive_info_struct *get_drv(struct gendisk *disk)
817{
818 return disk->private_data;
819}
820
821/*
822 * Open. Make sure the device is really there.
823 */
ef7822c2 824static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 825{
ef7822c2
AV		 826 ctlr_info_t *host = get_host(bdev->bd_disk);
827 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4
LT		 828
829#ifdef CCISS_DEBUG
ef7822c2 830 printk(KERN_DEBUG "cciss_open %s\n", bdev->bd_disk->disk_name);
7c832835 831#endif /* CCISS_DEBUG */
1da177e4 832
ddd47442
MM		 833 if (host->busy_initializing || drv->busy_configuring)
834 return -EBUSY;
1da177e4
LT		 835 /*
836 * Root is allowed to open raw volume zero even if it's not configured
837 * so array config can still work. Root is also allowed to open any
838 * volume that has a LUN ID, so it can issue IOCTL to reread the
839 * disk information. I don't think I really like this
840 * but I'm already using way to many device nodes to claim another one
841 * for "raw controller".
842 */
7a06f789 843 if (drv->heads == 0) {
ef7822c2 844 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 845 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 846 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 847 return -ENXIO;
1da177e4
LT		 848 /* if it is, make sure we have a LUN ID */
849 } else if (drv->LunID == 0) {
850 return -ENXIO;
851 }
852 }
853 if (!capable(CAP_SYS_ADMIN))
854 return -EPERM;
855 }
856 drv->usage_count++;
857 host->usage_count++;
858 return 0;
859}
7c832835 860
1da177e4
LT		 861/*
862 * Close. Sync first.
863 */
ef7822c2 864static int cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 865{
ef7822c2
AV		 866 ctlr_info_t *host = get_host(disk);
867 drive_info_struct *drv = get_drv(disk);
1da177e4
LT		 868
869#ifdef CCISS_DEBUG
ef7822c2 870 printk(KERN_DEBUG "cciss_release %s\n", disk->disk_name);
7c832835 871#endif /* CCISS_DEBUG */
1da177e4
LT		 872
873 drv->usage_count--;
874 host->usage_count--;
875 return 0;
876}
877
878#ifdef CONFIG_COMPAT
879
ef7822c2
AV		 880static int do_ioctl(struct block_device *bdev, fmode_t mode,
881 unsigned cmd, unsigned long arg)
1da177e4
LT		 882{
883 int ret;
884 lock_kernel();
ef7822c2 885 ret = cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 886 unlock_kernel();
887 return ret;
888}
889
ef7822c2
AV		 890static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
891 unsigned cmd, unsigned long arg);
892static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
893 unsigned cmd, unsigned long arg);
1da177e4 894
ef7822c2
AV		 895static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
896 unsigned cmd, unsigned long arg)
1da177e4
LT		 897{
898 switch (cmd) {
899 case CCISS_GETPCIINFO:
900 case CCISS_GETINTINFO:
901 case CCISS_SETINTINFO:
902 case CCISS_GETNODENAME:
903 case CCISS_SETNODENAME:
904 case CCISS_GETHEARTBEAT:
905 case CCISS_GETBUSTYPES:
906 case CCISS_GETFIRMVER:
907 case CCISS_GETDRIVVER:
908 case CCISS_REVALIDVOLS:
909 case CCISS_DEREGDISK:
910 case CCISS_REGNEWDISK:
911 case CCISS_REGNEWD:
912 case CCISS_RESCANDISK:
913 case CCISS_GETLUNINFO:
ef7822c2 914 return do_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 915
916 case CCISS_PASSTHRU32:
ef7822c2 917 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 918 case CCISS_BIG_PASSTHRU32:
ef7822c2 919 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 920
921 default:
922 return -ENOIOCTLCMD;
923 }
924}
925
ef7822c2
AV		 926static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
927 unsigned cmd, unsigned long arg)
1da177e4
LT		 928{
929 IOCTL32_Command_struct __user *arg32 =
7c832835 930 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 931 IOCTL_Command_struct arg64;
932 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
933 int err;
934 u32 cp;
935
936 err = 0;
7c832835
BH		 937 err |=
938 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
939 sizeof(arg64.LUN_info));
940 err |=
941 copy_from_user(&arg64.Request, &arg32->Request,
942 sizeof(arg64.Request));
943 err |=
944 copy_from_user(&arg64.error_info, &arg32->error_info,
945 sizeof(arg64.error_info));
1da177e4
LT		 946 err |= get_user(arg64.buf_size, &arg32->buf_size);
947 err |= get_user(cp, &arg32->buf);
948 arg64.buf = compat_ptr(cp);
949 err |= copy_to_user(p, &arg64, sizeof(arg64));
950
951 if (err)
952 return -EFAULT;
953
ef7822c2 954 err = do_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 955 if (err)
956 return err;
7c832835
BH		 957 err |=
958 copy_in_user(&arg32->error_info, &p->error_info,
959 sizeof(arg32->error_info));
1da177e4
LT		 960 if (err)
961 return -EFAULT;
962 return err;
963}
964
ef7822c2
AV		 965static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
966 unsigned cmd, unsigned long arg)
1da177e4
LT		 967{
968 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 969 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 970 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 971 BIG_IOCTL_Command_struct __user *p =
972 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 973 int err;
974 u32 cp;
975
976 err = 0;
7c832835
BH		 977 err |=
978 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
979 sizeof(arg64.LUN_info));
980 err |=
981 copy_from_user(&arg64.Request, &arg32->Request,
982 sizeof(arg64.Request));
983 err |=
984 copy_from_user(&arg64.error_info, &arg32->error_info,
985 sizeof(arg64.error_info));
1da177e4
LT		 986 err |= get_user(arg64.buf_size, &arg32->buf_size);
987 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
988 err |= get_user(cp, &arg32->buf);
989 arg64.buf = compat_ptr(cp);
990 err |= copy_to_user(p, &arg64, sizeof(arg64));
991
992 if (err)
7c832835 993 return -EFAULT;
1da177e4 994
ef7822c2 995 err = do_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 996 if (err)
997 return err;
7c832835
BH		 998 err |=
999 copy_in_user(&arg32->error_info, &p->error_info,
1000 sizeof(arg32->error_info));
1da177e4
LT		 1001 if (err)
1002 return -EFAULT;
1003 return err;
1004}
1005#endif
a885c8c4
CH		 1006
1007static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1008{
1009 drive_info_struct *drv = get_drv(bdev->bd_disk);
1010
1011 if (!drv->cylinders)
1012 return -ENXIO;
1013
1014 geo->heads = drv->heads;
1015 geo->sectors = drv->sectors;
1016 geo->cylinders = drv->cylinders;
1017 return 0;
1018}
1019
0a9279cc
MM		 1020static void check_ioctl_unit_attention(ctlr_info_t *host, CommandList_struct *c)
1021{
1022 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1023 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
1024 (void)check_for_unit_attention(host, c);
1025}
1da177e4 1026/*
7c832835 1027 * ioctl
1da177e4 1028 */
ef7822c2 1029static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 1030 unsigned int cmd, unsigned long arg)
1da177e4 1031{
1da177e4
LT		 1032 struct gendisk *disk = bdev->bd_disk;
1033 ctlr_info_t *host = get_host(disk);
1034 drive_info_struct *drv = get_drv(disk);
1035 int ctlr = host->ctlr;
1036 void __user *argp = (void __user *)arg;
1037
1038#ifdef CCISS_DEBUG
1039 printk(KERN_DEBUG "cciss_ioctl: Called with cmd=%x %lx\n", cmd, arg);
7c832835
BH		 1040#endif /* CCISS_DEBUG */
1041
1042 switch (cmd) {
1da177e4 1043 case CCISS_GETPCIINFO:
7c832835
BH		 1044 {
1045 cciss_pci_info_struct pciinfo;
1046
1047 if (!arg)
1048 return -EINVAL;
1049 pciinfo.domain = pci_domain_nr(host->pdev->bus);
1050 pciinfo.bus = host->pdev->bus->number;
1051 pciinfo.dev_fn = host->pdev->devfn;
1052 pciinfo.board_id = host->board_id;
1053 if (copy_to_user
1054 (argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1055 return -EFAULT;
1056 return 0;
1057 }
1da177e4 1058 case CCISS_GETINTINFO:
7c832835
BH		 1059 {
1060 cciss_coalint_struct intinfo;
1061 if (!arg)
1062 return -EINVAL;
1063 intinfo.delay =
1064 readl(&host->cfgtable->HostWrite.CoalIntDelay);
1065 intinfo.count =
1066 readl(&host->cfgtable->HostWrite.CoalIntCount);
1067 if (copy_to_user
1068 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1069 return -EFAULT;
1070 return 0;
1071 }
1da177e4 1072 case CCISS_SETINTINFO:
1da177e4 1073 {
7c832835
BH		 1074 cciss_coalint_struct intinfo;
1075 unsigned long flags;
1076 int i;
1077
1078 if (!arg)
1079 return -EINVAL;
1080 if (!capable(CAP_SYS_ADMIN))
1081 return -EPERM;
1082 if (copy_from_user
1083 (&intinfo, argp, sizeof(cciss_coalint_struct)))
1084 return -EFAULT;
1085 if ((intinfo.delay == 0) && (intinfo.count == 0))
1086 {
1087// printk("cciss_ioctl: delay and count cannot be 0\n");
1088 return -EINVAL;
1089 }
1090 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1091 /* Update the field, and then ring the doorbell */
1092 writel(intinfo.delay,
1093 &(host->cfgtable->HostWrite.CoalIntDelay));
1094 writel(intinfo.count,
1095 &(host->cfgtable->HostWrite.CoalIntCount));
1096 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1097
1098 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1099 if (!(readl(host->vaddr + SA5_DOORBELL)
1100 & CFGTBL_ChangeReq))
1101 break;
1102 /* delay and try again */
1103 udelay(1000);
1104 }
1105 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1106 if (i >= MAX_IOCTL_CONFIG_WAIT)
1107 return -EAGAIN;
1108 return 0;
1da177e4 1109 }
1da177e4 1110 case CCISS_GETNODENAME:
7c832835
BH		 1111 {
1112 NodeName_type NodeName;
1113 int i;
1114
1115 if (!arg)
1116 return -EINVAL;
1117 for (i = 0; i < 16; i++)
1118 NodeName[i] =
1119 readb(&host->cfgtable->ServerName[i]);
1120 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1121 return -EFAULT;
1122 return 0;
1123 }
1da177e4 1124 case CCISS_SETNODENAME:
7c832835
BH		 1125 {
1126 NodeName_type NodeName;
1127 unsigned long flags;
1128 int i;
1129
1130 if (!arg)
1131 return -EINVAL;
1132 if (!capable(CAP_SYS_ADMIN))
1133 return -EPERM;
1134
1135 if (copy_from_user
1136 (NodeName, argp, sizeof(NodeName_type)))
1137 return -EFAULT;
1138
1139 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1140
1141 /* Update the field, and then ring the doorbell */
1142 for (i = 0; i < 16; i++)
1143 writeb(NodeName[i],
1144 &host->cfgtable->ServerName[i]);
1145
1146 writel(CFGTBL_ChangeReq, host->vaddr + SA5_DOORBELL);
1147
1148 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1149 if (!(readl(host->vaddr + SA5_DOORBELL)
1150 & CFGTBL_ChangeReq))
1151 break;
1152 /* delay and try again */
1153 udelay(1000);
1154 }
1155 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1156 if (i >= MAX_IOCTL_CONFIG_WAIT)
1157 return -EAGAIN;
1158 return 0;
1159 }
1da177e4
LT		 1160
1161 case CCISS_GETHEARTBEAT:
7c832835
BH		 1162 {
1163 Heartbeat_type heartbeat;
1164
1165 if (!arg)
1166 return -EINVAL;
1167 heartbeat = readl(&host->cfgtable->HeartBeat);
1168 if (copy_to_user
1169 (argp, &heartbeat, sizeof(Heartbeat_type)))
1170 return -EFAULT;
1171 return 0;
1172 }
1da177e4 1173 case CCISS_GETBUSTYPES:
7c832835
BH		 1174 {
1175 BusTypes_type BusTypes;
1176
1177 if (!arg)
1178 return -EINVAL;
1179 BusTypes = readl(&host->cfgtable->BusTypes);
1180 if (copy_to_user
1181 (argp, &BusTypes, sizeof(BusTypes_type)))
1182 return -EFAULT;
1183 return 0;
1184 }
1da177e4 1185 case CCISS_GETFIRMVER:
7c832835
BH		 1186 {
1187 FirmwareVer_type firmware;
1da177e4 1188
7c832835
BH		 1189 if (!arg)
1190 return -EINVAL;
1191 memcpy(firmware, host->firm_ver, 4);
1da177e4 1192
7c832835
BH		 1193 if (copy_to_user
1194 (argp, firmware, sizeof(FirmwareVer_type)))
1195 return -EFAULT;
1196 return 0;
1197 }
1198 case CCISS_GETDRIVVER:
1199 {
1200 DriverVer_type DriverVer = DRIVER_VERSION;
1da177e4 1201
7c832835
BH		 1202 if (!arg)
1203 return -EINVAL;
1da177e4 1204
7c832835
BH		 1205 if (copy_to_user
1206 (argp, &DriverVer, sizeof(DriverVer_type)))
1207 return -EFAULT;
1208 return 0;
1209 }
1da177e4 1210
6ae5ce8e
MM		 1211 case CCISS_DEREGDISK:
1212 case CCISS_REGNEWD:
1da177e4 1213 case CCISS_REVALIDVOLS:
2d11d993 1214 return rebuild_lun_table(host, 0, 1);
7c832835
BH		 1215
1216 case CCISS_GETLUNINFO:{
1217 LogvolInfo_struct luninfo;
1218
1219 luninfo.LunID = drv->LunID;
1220 luninfo.num_opens = drv->usage_count;
1221 luninfo.num_parts = 0;
1222 if (copy_to_user(argp, &luninfo,
1223 sizeof(LogvolInfo_struct)))
1224 return -EFAULT;
1225 return 0;
1226 }
1da177e4 1227 case CCISS_PASSTHRU:
1da177e4 1228 {
7c832835
BH		 1229 IOCTL_Command_struct iocommand;
1230 CommandList_struct *c;
1231 char *buff = NULL;
1232 u64bit temp64;
1233 unsigned long flags;
6e9a4738 1234 DECLARE_COMPLETION_ONSTACK(wait);
1da177e4 1235
7c832835
BH		 1236 if (!arg)
1237 return -EINVAL;
1da177e4 1238
7c832835
BH		 1239 if (!capable(CAP_SYS_RAWIO))
1240 return -EPERM;
1da177e4 1241
7c832835
BH		 1242 if (copy_from_user
1243 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1244 return -EFAULT;
1245 if ((iocommand.buf_size < 1) &&
1246 (iocommand.Request.Type.Direction != XFER_NONE)) {
1247 return -EINVAL;
1248 }
1249#if 0 /* 'buf_size' member is 16-bits, and always smaller than kmalloc limit */
1250 /* Check kmalloc limits */
1251 if (iocommand.buf_size > 128000)
1252 return -EINVAL;
1253#endif
1254 if (iocommand.buf_size > 0) {
1255 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1256 if (buff == NULL)
1257 return -EFAULT;
1258 }
1259 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1260 /* Copy the data into the buffer we created */
1261 if (copy_from_user
1262 (buff, iocommand.buf, iocommand.buf_size)) {
1263 kfree(buff);
1264 return -EFAULT;
1265 }
1266 } else {
1267 memset(buff, 0, iocommand.buf_size);
1268 }
1269 if ((c = cmd_alloc(host, 0)) == NULL) {
1270 kfree(buff);
1271 return -ENOMEM;
1272 }
1273 // Fill in the command type
1274 c->cmd_type = CMD_IOCTL_PEND;
1275 // Fill in Command Header
1276 c->Header.ReplyQueue = 0; // unused in simple mode
1277 if (iocommand.buf_size > 0) // buffer to fill
1278 {
1279 c->Header.SGList = 1;
1280 c->Header.SGTotal = 1;
1281 } else // no buffers to fill
1282 {
1283 c->Header.SGList = 0;
1284 c->Header.SGTotal = 0;
1285 }
1286 c->Header.LUN = iocommand.LUN_info;
1287 c->Header.Tag.lower = c->busaddr; // use the kernel address the cmd block for tag
1da177e4 1288
7c832835
BH		 1289 // Fill in Request block
1290 c->Request = iocommand.Request;
1da177e4 1291
7c832835
BH		 1292 // Fill in the scatter gather information
1293 if (iocommand.buf_size > 0) {
1294 temp64.val = pci_map_single(host->pdev, buff,
1295 iocommand.buf_size,
1296 PCI_DMA_BIDIRECTIONAL);
1297 c->SG[0].Addr.lower = temp64.val32.lower;
1298 c->SG[0].Addr.upper = temp64.val32.upper;
1299 c->SG[0].Len = iocommand.buf_size;
1300 c->SG[0].Ext = 0; // we are not chaining
1301 }
1302 c->waiting = &wait;
1303
1304 /* Put the request on the tail of the request queue */
1305 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1306 addQ(&host->reqQ, c);
1307 host->Qdepth++;
1308 start_io(host);
1309 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1310
1311 wait_for_completion(&wait);
1312
1313 /* unlock the buffers from DMA */
1314 temp64.val32.lower = c->SG[0].Addr.lower;
1315 temp64.val32.upper = c->SG[0].Addr.upper;
1316 pci_unmap_single(host->pdev, (dma_addr_t) temp64.val,
1317 iocommand.buf_size,
1318 PCI_DMA_BIDIRECTIONAL);
1319
0a9279cc
MM		 1320 check_ioctl_unit_attention(host, c);
1321
7c832835
BH		 1322 /* Copy the error information out */
1323 iocommand.error_info = *(c->err_info);
1324 if (copy_to_user
1325 (argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1326 kfree(buff);
1da177e4
LT		 1327 cmd_free(host, c, 0);
1328 return -EFAULT;
1329 }
7c832835
BH		 1330
1331 if (iocommand.Request.Type.Direction == XFER_READ) {
1332 /* Copy the data out of the buffer we created */
1333 if (copy_to_user
1334 (iocommand.buf, buff, iocommand.buf_size)) {
1335 kfree(buff);
1336 cmd_free(host, c, 0);
1337 return -EFAULT;
1338 }
1339 }
1340 kfree(buff);
1341 cmd_free(host, c, 0);
1342 return 0;
1da177e4 1343 }
7c832835
BH		 1344 case CCISS_BIG_PASSTHRU:{
1345 BIG_IOCTL_Command_struct *ioc;
1346 CommandList_struct *c;
1347 unsigned char **buff = NULL;
1348 int *buff_size = NULL;
1349 u64bit temp64;
1350 unsigned long flags;
1351 BYTE sg_used = 0;
1352 int status = 0;
1353 int i;
6e9a4738 1354 DECLARE_COMPLETION_ONSTACK(wait);
7c832835
BH		 1355 __u32 left;
1356 __u32 sz;
1357 BYTE __user *data_ptr;
1358
1359 if (!arg)
1360 return -EINVAL;
1361 if (!capable(CAP_SYS_RAWIO))
1362 return -EPERM;
1363 ioc = (BIG_IOCTL_Command_struct *)
1364 kmalloc(sizeof(*ioc), GFP_KERNEL);
1365 if (!ioc) {
1366 status = -ENOMEM;
1367 goto cleanup1;
1368 }
1369 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1370 status = -EFAULT;
1371 goto cleanup1;
1372 }
1373 if ((ioc->buf_size < 1) &&
1374 (ioc->Request.Type.Direction != XFER_NONE)) {
1da177e4
LT		 1375 status = -EINVAL;
1376 goto cleanup1;
7c832835
BH		 1377 }
1378 /* Check kmalloc limits using all SGs */
1379 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1380 status = -EINVAL;
1381 goto cleanup1;
1382 }
1383 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1384 status = -EINVAL;
1385 goto cleanup1;
1386 }
1387 buff =
1388 kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1389 if (!buff) {
1da177e4
LT		 1390 status = -ENOMEM;
1391 goto cleanup1;
1392 }
5cbded58 1393 buff_size = kmalloc(MAXSGENTRIES * sizeof(int),
7c832835
BH		 1394 GFP_KERNEL);
1395 if (!buff_size) {
1396 status = -ENOMEM;
1397 goto cleanup1;
1398 }
1399 left = ioc->buf_size;
1400 data_ptr = ioc->buf;
1401 while (left) {
1402 sz = (left >
1403 ioc->malloc_size) ? ioc->
1404 malloc_size : left;
1405 buff_size[sg_used] = sz;
1406 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1407 if (buff[sg_used] == NULL) {
1da177e4 1408 status = -ENOMEM;
15534d38
JA		 1409 goto cleanup1;
1410 }
7c832835
BH		 1411 if (ioc->Request.Type.Direction == XFER_WRITE) {
1412 if (copy_from_user
1413 (buff[sg_used], data_ptr, sz)) {
f7108f91 1414 status = -EFAULT;
7c832835
BH		 1415 goto cleanup1;
1416 }
1417 } else {
1418 memset(buff[sg_used], 0, sz);
1419 }
1420 left -= sz;
1421 data_ptr += sz;
1422 sg_used++;
1423 }
1424 if ((c = cmd_alloc(host, 0)) == NULL) {
1425 status = -ENOMEM;
1426 goto cleanup1;
1427 }
1428 c->cmd_type = CMD_IOCTL_PEND;
1429 c->Header.ReplyQueue = 0;
1430
1431 if (ioc->buf_size > 0) {
1432 c->Header.SGList = sg_used;
1433 c->Header.SGTotal = sg_used;
1da177e4 1434 } else {
7c832835
BH		 1435 c->Header.SGList = 0;
1436 c->Header.SGTotal = 0;
1da177e4 1437 }
7c832835
BH		 1438 c->Header.LUN = ioc->LUN_info;
1439 c->Header.Tag.lower = c->busaddr;
1440
1441 c->Request = ioc->Request;
1442 if (ioc->buf_size > 0) {
1443 int i;
1444 for (i = 0; i < sg_used; i++) {
1445 temp64.val =
1446 pci_map_single(host->pdev, buff[i],
1447 buff_size[i],
1448 PCI_DMA_BIDIRECTIONAL);
1449 c->SG[i].Addr.lower =
1450 temp64.val32.lower;
1451 c->SG[i].Addr.upper =
1452 temp64.val32.upper;
1453 c->SG[i].Len = buff_size[i];
1454 c->SG[i].Ext = 0; /* we are not chaining */
1455 }
1456 }
1457 c->waiting = &wait;
1458 /* Put the request on the tail of the request queue */
1459 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
1460 addQ(&host->reqQ, c);
1461 host->Qdepth++;
1462 start_io(host);
1463 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
1464 wait_for_completion(&wait);
1465 /* unlock the buffers from DMA */
1466 for (i = 0; i < sg_used; i++) {
1467 temp64.val32.lower = c->SG[i].Addr.lower;
1468 temp64.val32.upper = c->SG[i].Addr.upper;
1469 pci_unmap_single(host->pdev,
1470 (dma_addr_t) temp64.val, buff_size[i],
1da177e4 1471 PCI_DMA_BIDIRECTIONAL);
1da177e4 1472 }
0a9279cc 1473 check_ioctl_unit_attention(host, c);
7c832835
BH		 1474 /* Copy the error information out */
1475 ioc->error_info = *(c->err_info);
1476 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1477 cmd_free(host, c, 0);
1478 status = -EFAULT;
1479 goto cleanup1;
1480 }
1481 if (ioc->Request.Type.Direction == XFER_READ) {
1482 /* Copy the data out of the buffer we created */
1483 BYTE __user *ptr = ioc->buf;
1484 for (i = 0; i < sg_used; i++) {
1485 if (copy_to_user
1486 (ptr, buff[i], buff_size[i])) {
1487 cmd_free(host, c, 0);
1488 status = -EFAULT;
1489 goto cleanup1;
1490 }
1491 ptr += buff_size[i];
1da177e4 1492 }
1da177e4 1493 }
7c832835
BH		 1494 cmd_free(host, c, 0);
1495 status = 0;
1496 cleanup1:
1497 if (buff) {
1498 for (i = 0; i < sg_used; i++)
1499 kfree(buff[i]);
1500 kfree(buff);
1501 }
1502 kfree(buff_size);
1503 kfree(ioc);
1504 return status;
1da177e4 1505 }
03bbfee5
MMOD		 1506
1507 /* scsi_cmd_ioctl handles these, below, though some are not */
1508 /* very meaningful for cciss. SG_IO is the main one people want. */
1509
1510 case SG_GET_VERSION_NUM:
1511 case SG_SET_TIMEOUT:
1512 case SG_GET_TIMEOUT:
1513 case SG_GET_RESERVED_SIZE:
1514 case SG_SET_RESERVED_SIZE:
1515 case SG_EMULATED_HOST:
1516 case SG_IO:
1517 case SCSI_IOCTL_SEND_COMMAND:
ef7822c2 1518 return scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
03bbfee5
MMOD		 1519
1520 /* scsi_cmd_ioctl would normally handle these, below, but */
1521 /* they aren't a good fit for cciss, as CD-ROMs are */
1522 /* not supported, and we don't have any bus/target/lun */
1523 /* which we present to the kernel. */
1524
1525 case CDROM_SEND_PACKET:
1526 case CDROMCLOSETRAY:
1527 case CDROMEJECT:
1528 case SCSI_IOCTL_GET_IDLUN:
1529 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1530 default:
1531 return -ENOTTY;
1532 }
1da177e4
LT		 1533}
1534
7b30f092
JA		 1535static void cciss_check_queues(ctlr_info_t *h)
1536{
1537 int start_queue = h->next_to_run;
1538 int i;
1539
1540 /* check to see if we have maxed out the number of commands that can
1541 * be placed on the queue. If so then exit. We do this check here
1542 * in case the interrupt we serviced was from an ioctl and did not
1543 * free any new commands.
1544 */
f880632f 1545 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1546 return;
1547
1548 /* We have room on the queue for more commands. Now we need to queue
1549 * them up. We will also keep track of the next queue to run so
1550 * that every queue gets a chance to be started first.
1551 */
1552 for (i = 0; i < h->highest_lun + 1; i++) {
1553 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1554 /* make sure the disk has been added and the drive is real
1555 * because this can be called from the middle of init_one.
1556 */
1557 if (!(h->drv[curr_queue].queue) || !(h->drv[curr_queue].heads))
1558 continue;
1559 blk_start_queue(h->gendisk[curr_queue]->queue);
1560
1561 /* check to see if we have maxed out the number of commands
1562 * that can be placed on the queue.
1563 */
f880632f 1564 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1565 if (curr_queue == start_queue) {
1566 h->next_to_run =
1567 (start_queue + 1) % (h->highest_lun + 1);
1568 break;
1569 } else {
1570 h->next_to_run = curr_queue;
1571 break;
1572 }
7b30f092
JA		 1573 }
1574 }
1575}
1576
ca1e0484
MM		 1577static void cciss_softirq_done(struct request *rq)
1578{
1579 CommandList_struct *cmd = rq->completion_data;
1580 ctlr_info_t *h = hba[cmd->ctlr];
1581 unsigned long flags;
1582 u64bit temp64;
1583 int i, ddir;
1584
1585 if (cmd->Request.Type.Direction == XFER_READ)
1586 ddir = PCI_DMA_FROMDEVICE;
1587 else
1588 ddir = PCI_DMA_TODEVICE;
1589
1590 /* command did not need to be retried */
1591 /* unmap the DMA mapping for all the scatter gather elements */
7c832835 1592 for (i = 0; i < cmd->Header.SGList; i++) {
ca1e0484
MM		 1593 temp64.val32.lower = cmd->SG[i].Addr.lower;
1594 temp64.val32.upper = cmd->SG[i].Addr.upper;
1595 pci_unmap_page(h->pdev, temp64.val, cmd->SG[i].Len, ddir);
1596 }
1597
ca1e0484
MM		 1598#ifdef CCISS_DEBUG
1599 printk("Done with %p\n", rq);
7c832835 1600#endif /* CCISS_DEBUG */
ca1e0484 1601
c3a4d78c 1602 /* set the residual count for pc requests */
ac44e5b2 1603 if (blk_pc_request(rq))
c3a4d78c 1604 rq->resid_len = cmd->err_info->ResidualCnt;
ac44e5b2 1605
c3a4d78c 1606 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1607
ca1e0484 1608 spin_lock_irqsave(&h->lock, flags);
7c832835 1609 cmd_free(h, cmd, 1);
7b30f092 1610 cciss_check_queues(h);
ca1e0484
MM		 1611 spin_unlock_irqrestore(&h->lock, flags);
1612}
1613
b57695fe 1614static void log_unit_to_scsi3addr(ctlr_info_t *h, unsigned char scsi3addr[],
1615 uint32_t log_unit)
1616{
1617 log_unit = h->drv[log_unit].LunID & 0x03fff;
1618 memset(&scsi3addr[4], 0, 4);
1619 memcpy(&scsi3addr[0], &log_unit, 4);
1620 scsi3addr[3] |= 0x40;
1621}
1622
7fe06326
AP		 1623/* This function gets the SCSI vendor, model, and revision of a logical drive
1624 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1625 * they cannot be read.
1626 */
1627static void cciss_get_device_descr(int ctlr, int logvol, int withirq,
1628 char *vendor, char *model, char *rev)
1629{
1630 int rc;
1631 InquiryData_struct *inq_buf;
b57695fe 1632 unsigned char scsi3addr[8];
7fe06326
AP		 1633
1634 *vendor = '\0';
1635 *model = '\0';
1636 *rev = '\0';
1637
1638 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1639 if (!inq_buf)
1640 return;
1641
b57695fe 1642 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
7fe06326
AP		 1643 if (withirq)
1644 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1645 sizeof(InquiryData_struct), 0,
1646 scsi3addr, TYPE_CMD);
7fe06326
AP		 1647 else
1648 rc = sendcmd(CISS_INQUIRY, ctlr, inq_buf,
b57695fe 1649 sizeof(InquiryData_struct), 0,
1650 scsi3addr, TYPE_CMD);
7fe06326
AP		 1651 if (rc == IO_OK) {
1652 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1653 vendor[VENDOR_LEN] = '\0';
1654 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1655 model[MODEL_LEN] = '\0';
1656 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1657 rev[REV_LEN] = '\0';
1658 }
1659
1660 kfree(inq_buf);
1661 return;
1662}
1663
a72da29b
MM		 1664/* This function gets the serial number of a logical drive via
1665 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1666 * number cannot be had, for whatever reason, 16 bytes of 0xff
1667 * are returned instead.
1668 */
1669static void cciss_get_serial_no(int ctlr, int logvol, int withirq,
1670 unsigned char *serial_no, int buflen)
1671{
1672#define PAGE_83_INQ_BYTES 64
1673 int rc;
1674 unsigned char *buf;
b57695fe 1675 unsigned char scsi3addr[8];
a72da29b
MM		 1676
1677 if (buflen > 16)
1678 buflen = 16;
1679 memset(serial_no, 0xff, buflen);
1680 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1681 if (!buf)
1682 return;
1683 memset(serial_no, 0, buflen);
b57695fe 1684 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
a72da29b
MM		 1685 if (withirq)
1686 rc = sendcmd_withirq(CISS_INQUIRY, ctlr, buf,
b57695fe 1687 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1688 else
1689 rc = sendcmd(CISS_INQUIRY, ctlr, buf,
b57695fe 1690 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1691 if (rc == IO_OK)
1692 memcpy(serial_no, &buf[8], buflen);
1693 kfree(buf);
1694 return;
1695}
1696
617e1344
SC		 1697/*
1698 * cciss_add_disk sets up the block device queue for a logical drive
1699 */
1700static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1701 int drv_index)
1702{
1703 disk->queue = blk_init_queue(do_cciss_request, &h->lock);
e8074f79
SC		 1704 if (!disk->queue)
1705 goto init_queue_failure;
6ae5ce8e
MM		 1706 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1707 disk->major = h->major;
1708 disk->first_minor = drv_index << NWD_SHIFT;
1709 disk->fops = &cciss_fops;
617e1344
SC		 1710 if (h->drv[drv_index].dev == NULL) {
1711 if (cciss_create_ld_sysfs_entry(h, drv_index))
1712 goto cleanup_queue;
1713 }
6ae5ce8e 1714 disk->private_data = &h->drv[drv_index];
617e1344 1715 disk->driverfs_dev = h->drv[drv_index].dev;
6ae5ce8e
MM		 1716
1717 /* Set up queue information */
1718 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1719
1720 /* This is a hardware imposed limit. */
1721 blk_queue_max_hw_segments(disk->queue, MAXSGENTRIES);
1722
1723 /* This is a limit in the driver and could be eliminated. */
1724 blk_queue_max_phys_segments(disk->queue, MAXSGENTRIES);
1725
1726 blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
1727
1728 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1729
1730 disk->queue->queuedata = h;
1731
e1defc4f
MP		 1732 blk_queue_logical_block_size(disk->queue,
1733 h->drv[drv_index].block_size);
6ae5ce8e
MM		 1734
1735 /* Make sure all queue data is written out before */
1736 /* setting h->drv[drv_index].queue, as setting this */
1737 /* allows the interrupt handler to start the queue */
1738 wmb();
1739 h->drv[drv_index].queue = disk->queue;
1740 add_disk(disk);
617e1344
SC		 1741 return 0;
1742
1743cleanup_queue:
1744 blk_cleanup_queue(disk->queue);
1745 disk->queue = NULL;
e8074f79 1746init_queue_failure:
617e1344 1747 return -1;
6ae5ce8e
MM		 1748}
1749
ddd47442 1750/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1751 * If the usage_count is zero and it is a heretofore unknown drive, or,
1752 * the drive's capacity, geometry, or serial number has changed,
1753 * then the drive information will be updated and the disk will be
1754 * re-registered with the kernel. If these conditions don't hold,
1755 * then it will be left alone for the next reboot. The exception to this
1756 * is disk 0 which will always be left registered with the kernel since it
1757 * is also the controller node. Any changes to disk 0 will show up on
1758 * the next reboot.
7c832835 1759 */
2d11d993
SC		 1760static void cciss_update_drive_info(int ctlr, int drv_index, int first_time,
1761 int via_ioctl)
7c832835 1762{
ddd47442
MM		 1763 ctlr_info_t *h = hba[ctlr];
1764 struct gendisk *disk;
ddd47442
MM		 1765 InquiryData_struct *inq_buff = NULL;
1766 unsigned int block_size;
00988a35 1767 sector_t total_size;
ddd47442
MM		 1768 unsigned long flags = 0;
1769 int ret = 0;
a72da29b
MM		 1770 drive_info_struct *drvinfo;
1771
1772 /* Get information about the disk and modify the driver structure */
1773 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1774 drvinfo = kmalloc(sizeof(*drvinfo), GFP_KERNEL);
1775 if (inq_buff == NULL || drvinfo == NULL)
1776 goto mem_msg;
1777
1778 /* testing to see if 16-byte CDBs are already being used */
1779 if (h->cciss_read == CCISS_READ_16) {
1780 cciss_read_capacity_16(h->ctlr, drv_index, 1,
1781 &total_size, &block_size);
1782
1783 } else {
1784 cciss_read_capacity(ctlr, drv_index, 1,
1785 &total_size, &block_size);
1786
1787 /* if read_capacity returns all F's this volume is >2TB */
1788 /* in size so we switch to 16-byte CDB's for all */
1789 /* read/write ops */
1790 if (total_size == 0xFFFFFFFFULL) {
1791 cciss_read_capacity_16(ctlr, drv_index, 1,
1792 &total_size, &block_size);
1793 h->cciss_read = CCISS_READ_16;
1794 h->cciss_write = CCISS_WRITE_16;
1795 } else {
1796 h->cciss_read = CCISS_READ_10;
1797 h->cciss_write = CCISS_WRITE_10;
1798 }
1799 }
1800
1801 cciss_geometry_inquiry(ctlr, drv_index, 1, total_size, block_size,
1802 inq_buff, drvinfo);
1803 drvinfo->block_size = block_size;
1804 drvinfo->nr_blocks = total_size + 1;
1805
7fe06326
AP		 1806 cciss_get_device_descr(ctlr, drv_index, 1, drvinfo->vendor,
1807 drvinfo->model, drvinfo->rev);
a72da29b
MM		 1808 cciss_get_serial_no(ctlr, drv_index, 1, drvinfo->serial_no,
1809 sizeof(drvinfo->serial_no));
1810
1811 /* Is it the same disk we already know, and nothing's changed? */
1812 if (h->drv[drv_index].raid_level != -1 &&
1813 ((memcmp(drvinfo->serial_no,
1814 h->drv[drv_index].serial_no, 16) == 0) &&
1815 drvinfo->block_size == h->drv[drv_index].block_size &&
1816 drvinfo->nr_blocks == h->drv[drv_index].nr_blocks &&
1817 drvinfo->heads == h->drv[drv_index].heads &&
1818 drvinfo->sectors == h->drv[drv_index].sectors &&
6ae5ce8e 1819 drvinfo->cylinders == h->drv[drv_index].cylinders))
a72da29b
MM		 1820 /* The disk is unchanged, nothing to update */
1821 goto freeret;
a72da29b 1822
6ae5ce8e
MM		 1823 /* If we get here it's not the same disk, or something's changed,
1824 * so we need to * deregister it, and re-register it, if it's not
1825 * in use.
1826 * If the disk already exists then deregister it before proceeding
1827 * (unless it's the first disk (for the controller node).
1828 */
a72da29b
MM		 1829 if (h->drv[drv_index].raid_level != -1 && drv_index != 0) {
1830 printk(KERN_WARNING "disk %d has changed.\n", drv_index);
ddd47442
MM		 1831 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
1832 h->drv[drv_index].busy_configuring = 1;
1833 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
e14ac670 1834
6ae5ce8e
MM		 1835 /* deregister_disk sets h->drv[drv_index].queue = NULL
1836 * which keeps the interrupt handler from starting
1837 * the queue.
1838 */
2d11d993 1839 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 1840 h->drv[drv_index].busy_configuring = 0;
1841 }
1842
1843 /* If the disk is in use return */
1844 if (ret)
a72da29b
MM		 1845 goto freeret;
1846
6ae5ce8e
MM		 1847 /* Save the new information from cciss_geometry_inquiry
1848 * and serial number inquiry.
1849 */
a72da29b
MM		 1850 h->drv[drv_index].block_size = drvinfo->block_size;
1851 h->drv[drv_index].nr_blocks = drvinfo->nr_blocks;
1852 h->drv[drv_index].heads = drvinfo->heads;
1853 h->drv[drv_index].sectors = drvinfo->sectors;
1854 h->drv[drv_index].cylinders = drvinfo->cylinders;
1855 h->drv[drv_index].raid_level = drvinfo->raid_level;
1856 memcpy(h->drv[drv_index].serial_no, drvinfo->serial_no, 16);
7fe06326
AP		 1857 memcpy(h->drv[drv_index].vendor, drvinfo->vendor, VENDOR_LEN + 1);
1858 memcpy(h->drv[drv_index].model, drvinfo->model, MODEL_LEN + 1);
1859 memcpy(h->drv[drv_index].rev, drvinfo->rev, REV_LEN + 1);
ddd47442
MM		 1860
1861 ++h->num_luns;
1862 disk = h->gendisk[drv_index];
1863 set_capacity(disk, h->drv[drv_index].nr_blocks);
1864
6ae5ce8e
MM		 1865 /* If it's not disk 0 (drv_index != 0)
1866 * or if it was disk 0, but there was previously
1867 * no actual corresponding configured logical drive
1868 * (raid_leve == -1) then we want to update the
1869 * logical drive's information.
1870 */
361e9b07
SC		 1871 if (drv_index || first_time) {
1872 if (cciss_add_disk(h, disk, drv_index) != 0) {
1873 cciss_free_gendisk(h, drv_index);
1874 printk(KERN_WARNING "cciss:%d could not update "
1875 "disk %d\n", h->ctlr, drv_index);
1876 --h->num_luns;
1877 }
1878 }
ddd47442 1879
6ae5ce8e 1880freeret:
ddd47442 1881 kfree(inq_buff);
a72da29b 1882 kfree(drvinfo);
ddd47442 1883 return;
6ae5ce8e 1884mem_msg:
ddd47442
MM		 1885 printk(KERN_ERR "cciss: out of memory\n");
1886 goto freeret;
1887}
1888
1889/* This function will find the first index of the controllers drive array
1890 * that has a -1 for the raid_level and will return that index. This is
1891 * where new drives will be added. If the index to be returned is greater
1892 * than the highest_lun index for the controller then highest_lun is set
1893 * to this new index. If there are no available indexes then -1 is returned.
eece695f
MM		 1894 * "controller_node" is used to know if this is a real logical drive, or just
1895 * the controller node, which determines if this counts towards highest_lun.
7c832835 1896 */
eece695f 1897static int cciss_find_free_drive_index(int ctlr, int controller_node)
ddd47442
MM		 1898{
1899 int i;
1900
7c832835
BH		 1901 for (i = 0; i < CISS_MAX_LUN; i++) {
1902 if (hba[ctlr]->drv[i].raid_level == -1) {
ddd47442 1903 if (i > hba[ctlr]->highest_lun)
eece695f
MM		 1904 if (!controller_node)
1905 hba[ctlr]->highest_lun = i;
ddd47442
MM		 1906 return i;
1907 }
1908 }
1909 return -1;
1910}
1911
361e9b07
SC		 1912static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
1913{
1914 put_disk(h->gendisk[drv_index]);
1915 h->gendisk[drv_index] = NULL;
1916}
1917
6ae5ce8e
MM		 1918/* cciss_add_gendisk finds a free hba[]->drv structure
1919 * and allocates a gendisk if needed, and sets the lunid
1920 * in the drvinfo structure. It returns the index into
1921 * the ->drv[] array, or -1 if none are free.
1922 * is_controller_node indicates whether highest_lun should
1923 * count this disk, or if it's only being added to provide
1924 * a means to talk to the controller in case no logical
1925 * drives have yet been configured.
1926 */
eece695f 1927static int cciss_add_gendisk(ctlr_info_t *h, __u32 lunid, int controller_node)
6ae5ce8e
MM		 1928{
1929 int drv_index;
1930
eece695f 1931 drv_index = cciss_find_free_drive_index(h->ctlr, controller_node);
6ae5ce8e
MM		 1932 if (drv_index == -1)
1933 return -1;
8ce51966 1934
6ae5ce8e
MM		 1935 /*Check if the gendisk needs to be allocated */
1936 if (!h->gendisk[drv_index]) {
1937 h->gendisk[drv_index] =
1938 alloc_disk(1 << NWD_SHIFT);
1939 if (!h->gendisk[drv_index]) {
1940 printk(KERN_ERR "cciss%d: could not "
1941 "allocate a new disk %d\n",
1942 h->ctlr, drv_index);
1943 return -1;
1944 }
1945 }
1946 h->drv[drv_index].LunID = lunid;
097d0264
SC		 1947 if (h->drv[drv_index].dev == NULL) {
1948 if (cciss_create_ld_sysfs_entry(h, drv_index))
1949 goto err_free_disk;
1950 }
6ae5ce8e
MM		 1951 /* Don't need to mark this busy because nobody */
1952 /* else knows about this disk yet to contend */
1953 /* for access to it. */
1954 h->drv[drv_index].busy_configuring = 0;
1955 wmb();
1956 return drv_index;
7fe06326
AP		 1957
1958err_free_disk:
361e9b07 1959 cciss_free_gendisk(h, drv_index);
7fe06326 1960 return -1;
6ae5ce8e
MM		 1961}
1962
1963/* This is for the special case of a controller which
1964 * has no logical drives. In this case, we still need
1965 * to register a disk so the controller can be accessed
1966 * by the Array Config Utility.
1967 */
1968static void cciss_add_controller_node(ctlr_info_t *h)
1969{
1970 struct gendisk *disk;
1971 int drv_index;
1972
1973 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
1974 return;
1975
eece695f 1976 drv_index = cciss_add_gendisk(h, 0, 1);
361e9b07
SC		 1977 if (drv_index == -1)
1978 goto error;
6ae5ce8e
MM		 1979 h->drv[drv_index].block_size = 512;
1980 h->drv[drv_index].nr_blocks = 0;
1981 h->drv[drv_index].heads = 0;
1982 h->drv[drv_index].sectors = 0;
1983 h->drv[drv_index].cylinders = 0;
1984 h->drv[drv_index].raid_level = -1;
1985 memset(h->drv[drv_index].serial_no, 0, 16);
1986 disk = h->gendisk[drv_index];
361e9b07
SC		 1987 if (cciss_add_disk(h, disk, drv_index) == 0)
1988 return;
1989 cciss_free_gendisk(h, drv_index);
1990error:
1991 printk(KERN_WARNING "cciss%d: could not "
1992 "add disk 0.\n", h->ctlr);
1993 return;
6ae5ce8e
MM		 1994}
1995
ddd47442 1996/* This function will add and remove logical drives from the Logical
d14c4ab5 1997 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 1998 * so that mount points are preserved until the next reboot. This allows
1999 * for the removal of logical drives in the middle of the drive array
2000 * without a re-ordering of those drives.
2001 * INPUT
2002 * h = The controller to perform the operations on
7c832835 2003 */
2d11d993
SC		 2004static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2005 int via_ioctl)
1da177e4 2006{
ddd47442
MM		 2007 int ctlr = h->ctlr;
2008 int num_luns;
2009 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2010 int return_code;
2011 int listlength = 0;
2012 int i;
2013 int drv_found;
2014 int drv_index = 0;
2015 __u32 lunid = 0;
1da177e4 2016 unsigned long flags;
ddd47442 2017
6ae5ce8e
MM		 2018 if (!capable(CAP_SYS_RAWIO))
2019 return -EPERM;
2020
ddd47442
MM		 2021 /* Set busy_configuring flag for this operation */
2022 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
7c832835 2023 if (h->busy_configuring) {
ddd47442
MM		 2024 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2025 return -EBUSY;
2026 }
2027 h->busy_configuring = 1;
a72da29b 2028 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
ddd47442 2029
a72da29b
MM		 2030 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2031 if (ld_buff == NULL)
2032 goto mem_msg;
2033
2034 return_code = sendcmd_withirq(CISS_REPORT_LOG, ctlr, ld_buff,
b57695fe 2035 sizeof(ReportLunData_struct),
2036 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2037
a72da29b
MM		 2038 if (return_code == IO_OK)
2039 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2040 else { /* reading number of logical volumes failed */
2041 printk(KERN_WARNING "cciss: report logical volume"
2042 " command failed\n");
2043 listlength = 0;
2044 goto freeret;
2045 }
2046
2047 num_luns = listlength / 8; /* 8 bytes per entry */
2048 if (num_luns > CISS_MAX_LUN) {
2049 num_luns = CISS_MAX_LUN;
2050 printk(KERN_WARNING "cciss: more luns configured"
2051 " on controller than can be handled by"
2052 " this driver.\n");
2053 }
2054
6ae5ce8e
MM		 2055 if (num_luns == 0)
2056 cciss_add_controller_node(h);
2057
2058 /* Compare controller drive array to driver's drive array
2059 * to see if any drives are missing on the controller due
2060 * to action of Array Config Utility (user deletes drive)
2061 * and deregister logical drives which have disappeared.
2062 */
a72da29b
MM		 2063 for (i = 0; i <= h->highest_lun; i++) {
2064 int j;
2065 drv_found = 0;
d8a0be6a
SC		 2066
2067 /* skip holes in the array from already deleted drives */
2068 if (h->drv[i].raid_level == -1)
2069 continue;
2070
a72da29b
MM		 2071 for (j = 0; j < num_luns; j++) {
2072 memcpy(&lunid, &ld_buff->LUN[j][0], 4);
2073 lunid = le32_to_cpu(lunid);
2074 if (h->drv[i].LunID == lunid) {
2075 drv_found = 1;
2076 break;
2077 }
2078 }
2079 if (!drv_found) {
2080 /* Deregister it from the OS, it's gone. */
2081 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2082 h->drv[i].busy_configuring = 1;
2083 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2d11d993 2084 return_code = deregister_disk(h, i, 1, via_ioctl);
a72da29b 2085 h->drv[i].busy_configuring = 0;
ddd47442 2086 }
a72da29b 2087 }
ddd47442 2088
a72da29b
MM		 2089 /* Compare controller drive array to driver's drive array.
2090 * Check for updates in the drive information and any new drives
2091 * on the controller due to ACU adding logical drives, or changing
2092 * a logical drive's size, etc. Reregister any new/changed drives
2093 */
2094 for (i = 0; i < num_luns; i++) {
2095 int j;
ddd47442 2096
a72da29b 2097 drv_found = 0;
ddd47442 2098
a72da29b
MM		 2099 memcpy(&lunid, &ld_buff->LUN[i][0], 4);
2100 lunid = le32_to_cpu(lunid);
ddd47442 2101
a72da29b
MM		 2102 /* Find if the LUN is already in the drive array
2103 * of the driver. If so then update its info
2104 * if not in use. If it does not exist then find
2105 * the first free index and add it.
2106 */
2107 for (j = 0; j <= h->highest_lun; j++) {
2108 if (h->drv[j].raid_level != -1 &&
2109 h->drv[j].LunID == lunid) {
2110 drv_index = j;
2111 drv_found = 1;
2112 break;
ddd47442 2113 }
a72da29b 2114 }
ddd47442 2115
a72da29b
MM		 2116 /* check if the drive was found already in the array */
2117 if (!drv_found) {
eece695f 2118 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2119 if (drv_index == -1)
2120 goto freeret;
a72da29b 2121 }
2d11d993
SC		 2122 cciss_update_drive_info(ctlr, drv_index, first_time,
2123 via_ioctl);
a72da29b 2124 } /* end for */
ddd47442 2125
6ae5ce8e 2126freeret:
ddd47442
MM		 2127 kfree(ld_buff);
2128 h->busy_configuring = 0;
2129 /* We return -1 here to tell the ACU that we have registered/updated
2130 * all of the drives that we can and to keep it from calling us
2131 * additional times.
7c832835 2132 */
ddd47442 2133 return -1;
6ae5ce8e 2134mem_msg:
ddd47442 2135 printk(KERN_ERR "cciss: out of memory\n");
a72da29b 2136 h->busy_configuring = 0;
ddd47442
MM		 2137 goto freeret;
2138}
2139
9ddb27b4
SC		 2140static void cciss_clear_drive_info(drive_info_struct *drive_info)
2141{
2142 /* zero out the disk size info */
2143 drive_info->nr_blocks = 0;
2144 drive_info->block_size = 0;
2145 drive_info->heads = 0;
2146 drive_info->sectors = 0;
2147 drive_info->cylinders = 0;
2148 drive_info->raid_level = -1;
2149 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2150 memset(drive_info->model, 0, sizeof(drive_info->model));
2151 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2152 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2153 /*
2154 * don't clear the LUNID though, we need to remember which
2155 * one this one is.
2156 */
2157}
2158
ddd47442
MM		 2159/* This function will deregister the disk and it's queue from the
2160 * kernel. It must be called with the controller lock held and the
2161 * drv structures busy_configuring flag set. It's parameters are:
2162 *
2163 * disk = This is the disk to be deregistered
2164 * drv = This is the drive_info_struct associated with the disk to be
2165 * deregistered. It contains information about the disk used
2166 * by the driver.
2167 * clear_all = This flag determines whether or not the disk information
2168 * is going to be completely cleared out and the highest_lun
2169 * reset. Sometimes we want to clear out information about
d14c4ab5 2170 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2171 * the highest_lun should be left unchanged and the LunID
2172 * should not be cleared.
2d11d993
SC		 2173 * via_ioctl
2174 * This indicates whether we've reached this path via ioctl.
2175 * This affects the maximum usage count allowed for c0d0 to be messed with.
2176 * If this path is reached via ioctl(), then the max_usage_count will
2177 * be 1, as the process calling ioctl() has got to have the device open.
2178 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2179*/
a0ea8622 2180static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2181 int clear_all, int via_ioctl)
ddd47442 2182{
799202cb 2183 int i;
a0ea8622
SC		 2184 struct gendisk *disk;
2185 drive_info_struct *drv;
1da177e4
LT		 2186
2187 if (!capable(CAP_SYS_RAWIO))
2188 return -EPERM;
2189
a0ea8622
SC		 2190 drv = &h->drv[drv_index];
2191 disk = h->gendisk[drv_index];
2192
1da177e4 2193 /* make sure logical volume is NOT is use */
7c832835 2194 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2195 if (drv->usage_count > via_ioctl)
7c832835
BH		 2196 return -EBUSY;
2197 } else if (drv->usage_count > 0)
2198 return -EBUSY;
1da177e4 2199
ddd47442
MM		 2200 /* invalidate the devices and deregister the disk. If it is disk
2201 * zero do not deregister it but just zero out it's values. This
2202 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2203 */
2204 if (h->gendisk[0] != disk) {
5a9df732 2205 struct request_queue *q = disk->queue;
097d0264 2206 if (disk->flags & GENHD_FL_UP) {
8ce51966 2207 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2208 del_gendisk(disk);
097d0264 2209 }
5a9df732
AB		 2210 if (q) {
2211 blk_cleanup_queue(q);
2212 /* Set drv->queue to NULL so that we do not try
2213 * to call blk_start_queue on this queue in the
2214 * interrupt handler
2215 */
2216 drv->queue = NULL;
2217 }
2218 /* If clear_all is set then we are deleting the logical
2219 * drive, not just refreshing its info. For drives
2220 * other than disk 0 we will call put_disk. We do not
2221 * do this for disk 0 as we need it to be able to
2222 * configure the controller.
a72da29b 2223 */
5a9df732
AB		 2224 if (clear_all){
2225 /* This isn't pretty, but we need to find the
2226 * disk in our array and NULL our the pointer.
2227 * This is so that we will call alloc_disk if
2228 * this index is used again later.
a72da29b 2229 */
5a9df732 2230 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2231 if (h->gendisk[i] == disk) {
5a9df732
AB		 2232 h->gendisk[i] = NULL;
2233 break;
799202cb 2234 }
799202cb 2235 }
5a9df732 2236 put_disk(disk);
ddd47442 2237 }
799202cb
MM		 2238 } else {
2239 set_capacity(disk, 0);
ddd47442
MM		 2240 }
2241
2242 --h->num_luns;
9ddb27b4
SC		 2243 cciss_clear_drive_info(drv);
2244
7c832835
BH		 2245 if (clear_all) {
2246 /* check to see if it was the last disk */
2247 if (drv == h->drv + h->highest_lun) {
2248 /* if so, find the new hightest lun */
2249 int i, newhighest = -1;
a72da29b 2250 for (i = 0; i <= h->highest_lun; i++) {
7c832835 2251 /* if the disk has size > 0, it is available */
ddd47442 2252 if (h->drv[i].heads)
7c832835
BH		 2253 newhighest = i;
2254 }
2255 h->highest_lun = newhighest;
1da177e4 2256 }
ddd47442 2257
7c832835 2258 drv->LunID = 0;
ddd47442 2259 }
e2019b58 2260 return 0;
1da177e4 2261}
ddd47442 2262
b57695fe 2263static int fill_cmd(CommandList_struct *c, __u8 cmd, int ctlr, void *buff,
2264 size_t size, __u8 page_code, unsigned char *scsi3addr,
2265 int cmd_type)
1da177e4 2266{
7c832835 2267 ctlr_info_t *h = hba[ctlr];
1da177e4
LT		 2268 u64bit buff_dma_handle;
2269 int status = IO_OK;
2270
2271 c->cmd_type = CMD_IOCTL_PEND;
2272 c->Header.ReplyQueue = 0;
7c832835 2273 if (buff != NULL) {
1da177e4 2274 c->Header.SGList = 1;
7c832835 2275 c->Header.SGTotal = 1;
1da177e4
LT		 2276 } else {
2277 c->Header.SGList = 0;
7c832835 2278 c->Header.SGTotal = 0;
1da177e4
LT		 2279 }
2280 c->Header.Tag.lower = c->busaddr;
b57695fe 2281 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2282
2283 c->Request.Type.Type = cmd_type;
2284 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2285 switch (cmd) {
2286 case CISS_INQUIRY:
1da177e4 2287 /* are we trying to read a vital product page */
7c832835 2288 if (page_code != 0) {
1da177e4
LT		 2289 c->Request.CDB[1] = 0x01;
2290 c->Request.CDB[2] = page_code;
2291 }
2292 c->Request.CDBLen = 6;
7c832835 2293 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2294 c->Request.Type.Direction = XFER_READ;
2295 c->Request.Timeout = 0;
7c832835
BH		 2296 c->Request.CDB[0] = CISS_INQUIRY;
2297 c->Request.CDB[4] = size & 0xFF;
2298 break;
1da177e4
LT		 2299 case CISS_REPORT_LOG:
2300 case CISS_REPORT_PHYS:
7c832835 2301 /* Talking to controller so It's a physical command
1da177e4 2302 mode = 00 target = 0. Nothing to write.
7c832835 2303 */
1da177e4
LT		 2304 c->Request.CDBLen = 12;
2305 c->Request.Type.Attribute = ATTR_SIMPLE;
2306 c->Request.Type.Direction = XFER_READ;
2307 c->Request.Timeout = 0;
2308 c->Request.CDB[0] = cmd;
7c832835 2309 c->Request.CDB[6] = (size >> 24) & 0xFF; //MSB
1da177e4
LT		 2310 c->Request.CDB[7] = (size >> 16) & 0xFF;
2311 c->Request.CDB[8] = (size >> 8) & 0xFF;
2312 c->Request.CDB[9] = size & 0xFF;
2313 break;
2314
2315 case CCISS_READ_CAPACITY:
1da177e4
LT		 2316 c->Request.CDBLen = 10;
2317 c->Request.Type.Attribute = ATTR_SIMPLE;
2318 c->Request.Type.Direction = XFER_READ;
2319 c->Request.Timeout = 0;
2320 c->Request.CDB[0] = cmd;
7c832835 2321 break;
00988a35 2322 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2323 c->Request.CDBLen = 16;
2324 c->Request.Type.Attribute = ATTR_SIMPLE;
2325 c->Request.Type.Direction = XFER_READ;
2326 c->Request.Timeout = 0;
2327 c->Request.CDB[0] = cmd;
2328 c->Request.CDB[1] = 0x10;
2329 c->Request.CDB[10] = (size >> 24) & 0xFF;
2330 c->Request.CDB[11] = (size >> 16) & 0xFF;
2331 c->Request.CDB[12] = (size >> 8) & 0xFF;
2332 c->Request.CDB[13] = size & 0xFF;
2333 c->Request.Timeout = 0;
2334 c->Request.CDB[0] = cmd;
2335 break;
1da177e4
LT		 2336 case CCISS_CACHE_FLUSH:
2337 c->Request.CDBLen = 12;
2338 c->Request.Type.Attribute = ATTR_SIMPLE;
2339 c->Request.Type.Direction = XFER_WRITE;
2340 c->Request.Timeout = 0;
2341 c->Request.CDB[0] = BMIC_WRITE;
2342 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
7c832835 2343 break;
88f627ae 2344 case TEST_UNIT_READY:
88f627ae
SC		 2345 c->Request.CDBLen = 6;
2346 c->Request.Type.Attribute = ATTR_SIMPLE;
2347 c->Request.Type.Direction = XFER_NONE;
2348 c->Request.Timeout = 0;
2349 break;
1da177e4
LT		 2350 default:
2351 printk(KERN_WARNING
7c832835 2352 "cciss%d: Unknown Command 0x%c\n", ctlr, cmd);
e2019b58 2353 return IO_ERROR;
1da177e4
LT		 2354 }
2355 } else if (cmd_type == TYPE_MSG) {
2356 switch (cmd) {
7c832835 2357 case 0: /* ABORT message */
3da8b713 2358 c->Request.CDBLen = 12;
2359 c->Request.Type.Attribute = ATTR_SIMPLE;
2360 c->Request.Type.Direction = XFER_WRITE;
2361 c->Request.Timeout = 0;
7c832835
BH		 2362 c->Request.CDB[0] = cmd; /* abort */
2363 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2364 /* buff contains the tag of the command to abort */
2365 memcpy(&c->Request.CDB[4], buff, 8);
2366 break;
7c832835 2367 case 1: /* RESET message */
88f627ae 2368 c->Request.CDBLen = 16;
3da8b713 2369 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2370 c->Request.Type.Direction = XFER_NONE;
3da8b713 2371 c->Request.Timeout = 0;
2372 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2373 c->Request.CDB[0] = cmd; /* reset */
88f627ae 2374 c->Request.CDB[1] = 0x03; /* reset a target */
00988a35 2375 break;
1da177e4
LT		 2376 case 3: /* No-Op message */
2377 c->Request.CDBLen = 1;
2378 c->Request.Type.Attribute = ATTR_SIMPLE;
2379 c->Request.Type.Direction = XFER_WRITE;
2380 c->Request.Timeout = 0;
2381 c->Request.CDB[0] = cmd;
2382 break;
2383 default:
2384 printk(KERN_WARNING
7c832835 2385 "cciss%d: unknown message type %d\n", ctlr, cmd);
1da177e4
LT		 2386 return IO_ERROR;
2387 }
2388 } else {
2389 printk(KERN_WARNING
7c832835 2390 "cciss%d: unknown command type %d\n", ctlr, cmd_type);
1da177e4
LT		 2391 return IO_ERROR;
2392 }
2393 /* Fill in the scatter gather information */
2394 if (size > 0) {
2395 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2396 buff, size,
2397 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2398 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2399 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2400 c->SG[0].Len = size;
7c832835 2401 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2402 }
2403 return status;
2404}
7c832835 2405
3c2ab402 2406static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2407{
2408 switch (c->err_info->ScsiStatus) {
2409 case SAM_STAT_GOOD:
2410 return IO_OK;
2411 case SAM_STAT_CHECK_CONDITION:
2412 switch (0xf & c->err_info->SenseInfo[2]) {
2413 case 0: return IO_OK; /* no sense */
2414 case 1: return IO_OK; /* recovered error */
2415 default:
2416 printk(KERN_WARNING "cciss%d: cmd 0x%02x "
2417 "check condition, sense key = 0x%02x\n",
2418 h->ctlr, c->Request.CDB[0],
2419 c->err_info->SenseInfo[2]);
2420 }
2421 break;
2422 default:
2423 printk(KERN_WARNING "cciss%d: cmd 0x%02x"
2424 "scsi status = 0x%02x\n", h->ctlr,
2425 c->Request.CDB[0], c->err_info->ScsiStatus);
2426 break;
2427 }
2428 return IO_ERROR;
2429}
2430
789a424a 2431static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2432{
5390cfc3 2433 int return_status = IO_OK;
7c832835 2434
789a424a 2435 if (c->err_info->CommandStatus == CMD_SUCCESS)
2436 return IO_OK;
5390cfc3 2437
2438 switch (c->err_info->CommandStatus) {
2439 case CMD_TARGET_STATUS:
3c2ab402 2440 return_status = check_target_status(h, c);
5390cfc3 2441 break;
2442 case CMD_DATA_UNDERRUN:
2443 case CMD_DATA_OVERRUN:
2444 /* expected for inquiry and report lun commands */
2445 break;
2446 case CMD_INVALID:
789a424a 2447 printk(KERN_WARNING "cciss: cmd 0x%02x is "
5390cfc3 2448 "reported invalid\n", c->Request.CDB[0]);
2449 return_status = IO_ERROR;
2450 break;
2451 case CMD_PROTOCOL_ERR:
2452 printk(KERN_WARNING "cciss: cmd 0x%02x has "
2453 "protocol error \n", c->Request.CDB[0]);
2454 return_status = IO_ERROR;
2455 break;
2456 case CMD_HARDWARE_ERR:
2457 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2458 " hardware error\n", c->Request.CDB[0]);
2459 return_status = IO_ERROR;
2460 break;
2461 case CMD_CONNECTION_LOST:
2462 printk(KERN_WARNING "cciss: cmd 0x%02x had "
2463 "connection lost\n", c->Request.CDB[0]);
2464 return_status = IO_ERROR;
2465 break;
2466 case CMD_ABORTED:
2467 printk(KERN_WARNING "cciss: cmd 0x%02x was "
2468 "aborted\n", c->Request.CDB[0]);
2469 return_status = IO_ERROR;
2470 break;
2471 case CMD_ABORT_FAILED:
2472 printk(KERN_WARNING "cciss: cmd 0x%02x reports "
2473 "abort failed\n", c->Request.CDB[0]);
2474 return_status = IO_ERROR;
2475 break;
2476 case CMD_UNSOLICITED_ABORT:
2477 printk(KERN_WARNING
2478 "cciss%d: unsolicited abort 0x%02x\n", h->ctlr,
2479 c->Request.CDB[0]);
789a424a 2480 return_status = IO_NEEDS_RETRY;
5390cfc3 2481 break;
2482 default:
2483 printk(KERN_WARNING "cciss: cmd 0x%02x returned "
2484 "unknown status %x\n", c->Request.CDB[0],
2485 c->err_info->CommandStatus);
2486 return_status = IO_ERROR;
7c832835 2487 }
789a424a 2488 return return_status;
2489}
2490
2491static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2492 int attempt_retry)
2493{
2494 DECLARE_COMPLETION_ONSTACK(wait);
2495 u64bit buff_dma_handle;
2496 unsigned long flags;
2497 int return_status = IO_OK;
2498
2499resend_cmd2:
2500 c->waiting = &wait;
2501 /* Put the request on the tail of the queue and send it */
2502 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
2503 addQ(&h->reqQ, c);
2504 h->Qdepth++;
2505 start_io(h);
2506 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
2507
2508 wait_for_completion(&wait);
2509
2510 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2511 goto command_done;
2512
2513 return_status = process_sendcmd_error(h, c);
2514
2515 if (return_status == IO_NEEDS_RETRY &&
2516 c->retry_count < MAX_CMD_RETRIES) {
2517 printk(KERN_WARNING "cciss%d: retrying 0x%02x\n", h->ctlr,
2518 c->Request.CDB[0]);
2519 c->retry_count++;
2520 /* erase the old error information */
2521 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2522 return_status = IO_OK;
2523 INIT_COMPLETION(wait);
2524 goto resend_cmd2;
2525 }
5390cfc3 2526
2527command_done:
1da177e4 2528 /* unlock the buffers from DMA */
bb2a37bf
MM		 2529 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2530 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2531 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2532 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2533 return return_status;
2534}
2535
b57695fe 2536static int sendcmd_withirq(__u8 cmd, int ctlr, void *buff, size_t size,
2537 __u8 page_code, unsigned char scsi3addr[],
2538 int cmd_type)
5390cfc3 2539{
2540 ctlr_info_t *h = hba[ctlr];
2541 CommandList_struct *c;
2542 int return_status;
2543
2544 c = cmd_alloc(h, 0);
2545 if (!c)
2546 return -ENOMEM;
b57695fe 2547 return_status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2548 scsi3addr, cmd_type);
5390cfc3 2549 if (return_status == IO_OK)
789a424a 2550 return_status = sendcmd_withirq_core(h, c, 1);
2551
1da177e4 2552 cmd_free(h, c, 0);
7c832835 2553 return return_status;
1da177e4 2554}
7c832835 2555
1da177e4 2556static void cciss_geometry_inquiry(int ctlr, int logvol,
00988a35 2557 int withirq, sector_t total_size,
7c832835
BH		 2558 unsigned int block_size,
2559 InquiryData_struct *inq_buff,
2560 drive_info_struct *drv)
1da177e4
LT		 2561{
2562 int return_code;
00988a35 2563 unsigned long t;
b57695fe 2564 unsigned char scsi3addr[8];
00988a35 2565
1da177e4 2566 memset(inq_buff, 0, sizeof(InquiryData_struct));
b57695fe 2567 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2568 if (withirq)
2569 return_code = sendcmd_withirq(CISS_INQUIRY, ctlr,
b57695fe 2570 inq_buff, sizeof(*inq_buff),
2571 0xC1, scsi3addr, TYPE_CMD);
1da177e4
LT		 2572 else
2573 return_code = sendcmd(CISS_INQUIRY, ctlr, inq_buff,
b57695fe 2574 sizeof(*inq_buff), 0xC1, scsi3addr,
7c832835 2575 TYPE_CMD);
1da177e4 2576 if (return_code == IO_OK) {
7c832835 2577 if (inq_buff->data_byte[8] == 0xFF) {
1da177e4 2578 printk(KERN_WARNING
7c832835
BH		 2579 "cciss: reading geometry failed, volume "
2580 "does not support reading geometry\n");
1da177e4 2581 drv->heads = 255;
7c832835 2582 drv->sectors = 32; // Sectors per track
7f42d3b8 2583 drv->cylinders = total_size + 1;
89f97ad1 2584 drv->raid_level = RAID_UNKNOWN;
1da177e4 2585 } else {
1da177e4
LT		 2586 drv->heads = inq_buff->data_byte[6];
2587 drv->sectors = inq_buff->data_byte[7];
2588 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2589 drv->cylinders += inq_buff->data_byte[5];
2590 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2591 }
2592 drv->block_size = block_size;
97c06978 2593 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2594 t = drv->heads * drv->sectors;
2595 if (t > 1) {
97c06978
MMOD		 2596 sector_t real_size = total_size + 1;
2597 unsigned long rem = sector_div(real_size, t);
3f7705ea 2598 if (rem)
97c06978
MMOD		 2599 real_size++;
2600 drv->cylinders = real_size;
1da177e4 2601 }
7c832835 2602 } else { /* Get geometry failed */
1da177e4
LT		 2603 printk(KERN_WARNING "cciss: reading geometry failed\n");
2604 }
cc088d10 2605 printk(KERN_INFO " heads=%d, sectors=%d, cylinders=%d\n\n",
7c832835 2606 drv->heads, drv->sectors, drv->cylinders);
1da177e4 2607}
7c832835 2608
1da177e4 2609static void
00988a35 2610cciss_read_capacity(int ctlr, int logvol, int withirq, sector_t *total_size,
7c832835 2611 unsigned int *block_size)
1da177e4 2612{
00988a35 2613 ReadCapdata_struct *buf;
1da177e4 2614 int return_code;
b57695fe 2615 unsigned char scsi3addr[8];
1aebe187
MK		 2616
2617 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2618 if (!buf) {
00988a35
MMOD		 2619 printk(KERN_WARNING "cciss: out of memory\n");
2620 return;
2621 }
1aebe187 2622
b57695fe 2623 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
1da177e4
LT		 2624 if (withirq)
2625 return_code = sendcmd_withirq(CCISS_READ_CAPACITY,
00988a35 2626 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2627 0, scsi3addr, TYPE_CMD);
1da177e4
LT		 2628 else
2629 return_code = sendcmd(CCISS_READ_CAPACITY,
00988a35 2630 ctlr, buf, sizeof(ReadCapdata_struct),
b57695fe 2631 0, scsi3addr, TYPE_CMD);
1da177e4 2632 if (return_code == IO_OK) {
4c1f2b31
AV		 2633 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2634 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2635 } else { /* read capacity command failed */
1da177e4
LT		 2636 printk(KERN_WARNING "cciss: read capacity failed\n");
2637 *total_size = 0;
2638 *block_size = BLOCK_SIZE;
2639 }
97c06978 2640 if (*total_size != 0)
7b92aadf 2641 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2642 (unsigned long long)*total_size+1, *block_size);
00988a35 2643 kfree(buf);
00988a35
MMOD		 2644}
2645
2646static void
2647cciss_read_capacity_16(int ctlr, int logvol, int withirq, sector_t *total_size, unsigned int *block_size)
2648{
2649 ReadCapdata_struct_16 *buf;
2650 int return_code;
b57695fe 2651 unsigned char scsi3addr[8];
1aebe187
MK		 2652
2653 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2654 if (!buf) {
00988a35
MMOD		 2655 printk(KERN_WARNING "cciss: out of memory\n");
2656 return;
2657 }
1aebe187 2658
b57695fe 2659 log_unit_to_scsi3addr(hba[ctlr], scsi3addr, logvol);
00988a35
MMOD		 2660 if (withirq) {
2661 return_code = sendcmd_withirq(CCISS_READ_CAPACITY_16,
2662 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2663 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2664 }
2665 else {
2666 return_code = sendcmd(CCISS_READ_CAPACITY_16,
2667 ctlr, buf, sizeof(ReadCapdata_struct_16),
b57695fe 2668 0, scsi3addr, TYPE_CMD);
00988a35
MMOD		 2669 }
2670 if (return_code == IO_OK) {
4c1f2b31
AV		 2671 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2672 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35
MMOD		 2673 } else { /* read capacity command failed */
2674 printk(KERN_WARNING "cciss: read capacity failed\n");
2675 *total_size = 0;
2676 *block_size = BLOCK_SIZE;
2677 }
7b92aadf 2678 printk(KERN_INFO " blocks= %llu block_size= %d\n",
97c06978 2679 (unsigned long long)*total_size+1, *block_size);
00988a35 2680 kfree(buf);
1da177e4
LT		 2681}
2682
1da177e4
LT		 2683static int cciss_revalidate(struct gendisk *disk)
2684{
2685 ctlr_info_t *h = get_host(disk);
2686 drive_info_struct *drv = get_drv(disk);
2687 int logvol;
7c832835 2688 int FOUND = 0;
1da177e4 2689 unsigned int block_size;
00988a35 2690 sector_t total_size;
1da177e4
LT		 2691 InquiryData_struct *inq_buff = NULL;
2692
7c832835
BH		 2693 for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) {
2694 if (h->drv[logvol].LunID == drv->LunID) {
2695 FOUND = 1;
1da177e4
LT		 2696 break;
2697 }
2698 }
2699
7c832835
BH		 2700 if (!FOUND)
2701 return 1;
1da177e4 2702
7c832835
BH		 2703 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2704 if (inq_buff == NULL) {
2705 printk(KERN_WARNING "cciss: out of memory\n");
7c832835
BH		 2706 return 1;
2707 }
00988a35
MMOD		 2708 if (h->cciss_read == CCISS_READ_10) {
2709 cciss_read_capacity(h->ctlr, logvol, 1,
2710 &total_size, &block_size);
2711 } else {
2712 cciss_read_capacity_16(h->ctlr, logvol, 1,
2713 &total_size, &block_size);
2714 }
7c832835
BH		 2715 cciss_geometry_inquiry(h->ctlr, logvol, 1, total_size, block_size,
2716 inq_buff, drv);
1da177e4 2717
e1defc4f 2718 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2719 set_capacity(disk, drv->nr_blocks);
2720
1da177e4
LT		 2721 kfree(inq_buff);
2722 return 0;
2723}
2724
2725/*
2726 * Wait polling for a command to complete.
2727 * The memory mapped FIFO is polled for the completion.
2728 * Used only at init time, interrupts from the HBA are disabled.
2729 */
2730static unsigned long pollcomplete(int ctlr)
2731{
2732 unsigned long done;
2733 int i;
2734
2735 /* Wait (up to 20 seconds) for a command to complete */
2736
2737 for (i = 20 * HZ; i > 0; i--) {
2738 done = hba[ctlr]->access.command_completed(hba[ctlr]);
86e84862
NA		 2739 if (done == FIFO_EMPTY)
2740 schedule_timeout_uninterruptible(1);
2741 else
e2019b58 2742 return done;
1da177e4
LT		 2743 }
2744 /* Invalid address to tell caller we ran out of time */
2745 return 1;
2746}
3da8b713 2747
4a4b2d76
SC		 2748/* Send command c to controller h and poll for it to complete.
2749 * Turns interrupts off on the board. Used at driver init time
2750 * and during SCSI error recovery.
1da177e4 2751 */
4a4b2d76 2752static int sendcmd_core(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2753{
1da177e4
LT		 2754 int i;
2755 unsigned long complete;
4a4b2d76 2756 int status = IO_ERROR;
1da177e4 2757 u64bit buff_dma_handle;
1da177e4 2758
4a4b2d76
SC		 2759resend_cmd1:
2760
2761 /* Disable interrupt on the board. */
2762 h->access.set_intr_mask(h, CCISS_INTR_OFF);
7c832835 2763
1da177e4 2764 /* Make sure there is room in the command FIFO */
7c832835 2765 /* Actually it should be completely empty at this time */
3da8b713 2766 /* unless we are in here doing error handling for the scsi */
2767 /* tape side of the driver. */
7c832835 2768 for (i = 200000; i > 0; i--) {
1da177e4 2769 /* if fifo isn't full go */
4a4b2d76 2770 if (!(h->access.fifo_full(h)))
7c832835 2771 break;
7c832835
BH		 2772 udelay(10);
2773 printk(KERN_WARNING "cciss cciss%d: SendCmd FIFO full,"
4a4b2d76 2774 " waiting!\n", h->ctlr);
7c832835 2775 }
4a4b2d76 2776 h->access.submit_command(h, c); /* Send the cmd */
3da8b713 2777 do {
4a4b2d76 2778 complete = pollcomplete(h->ctlr);
1da177e4
LT		 2779
2780#ifdef CCISS_DEBUG
3da8b713 2781 printk(KERN_DEBUG "cciss: command completed\n");
7c832835 2782#endif /* CCISS_DEBUG */
1da177e4 2783
3da8b713 2784 if (complete == 1) {
7c832835
BH		 2785 printk(KERN_WARNING
2786 "cciss cciss%d: SendCmd Timeout out, "
4a4b2d76 2787 "No command list address returned!\n", h->ctlr);
3da8b713 2788 status = IO_ERROR;
3da8b713 2789 break;
2790 }
2791
72f9f132 2792 /* Make sure it's the command we're expecting. */
4a4b2d76 2793 if ((complete & ~CISS_ERROR_BIT) != c->busaddr) {
72f9f132 2794 printk(KERN_WARNING "cciss%d: Unexpected command "
2795 "completion.\n", h->ctlr);
4a4b2d76
SC		 2796 continue;
2797 }
2798
2799 /* It is our command. If no error, we're done. */
2800 if (!(complete & CISS_ERROR_BIT)) {
2801 status = IO_OK;
2802 break;
2803 }
2804
2805 /* There is an error... */
2806
2807 /* if data overrun or underun on Report command ignore it */
2808 if (((c->Request.CDB[0] == CISS_REPORT_LOG) ||
2809 (c->Request.CDB[0] == CISS_REPORT_PHYS) ||
2810 (c->Request.CDB[0] == CISS_INQUIRY)) &&
2811 ((c->err_info->CommandStatus == CMD_DATA_OVERRUN) ||
2812 (c->err_info->CommandStatus == CMD_DATA_UNDERRUN))) {
2813 complete = c->busaddr;
2814 status = IO_OK;
2815 break;
1da177e4 2816 }
4a4b2d76
SC		 2817
2818 if (c->err_info->CommandStatus == CMD_UNSOLICITED_ABORT) {
2819 printk(KERN_WARNING "cciss%d: unsolicited abort %p\n",
2820 h->ctlr, c);
2821 if (c->retry_count < MAX_CMD_RETRIES) {
2822 printk(KERN_WARNING "cciss%d: retrying %p\n",
2823 h->ctlr, c);
2824 c->retry_count++;
2825 /* erase the old error information */
2826 memset(c->err_info, 0, sizeof(c->err_info));
2827 goto resend_cmd1;
3da8b713 2828 }
4a4b2d76
SC		 2829 printk(KERN_WARNING "cciss%d: retried %p too many "
2830 "times\n", h->ctlr, c);
2831 status = IO_ERROR;
3c2ab402 2832 break;
4a4b2d76
SC		 2833 }
2834
2835 if (c->err_info->CommandStatus == CMD_UNABORTABLE) {
2836 printk(KERN_WARNING "cciss%d: command could not be "
2837 "aborted.\n", h->ctlr);
2838 status = IO_ERROR;
3c2ab402 2839 break;
4a4b2d76
SC		 2840 }
2841
4a4b2d76 2842 if (c->err_info->CommandStatus == CMD_TARGET_STATUS) {
3c2ab402 2843 status = check_target_status(h, c);
2844 break;
4a4b2d76
SC		 2845 }
2846
3c2ab402 2847 printk(KERN_WARNING "cciss%d: sendcmd error\n", h->ctlr);
2848 printk(KERN_WARNING "cmd = 0x%02x, CommandStatus = 0x%02x\n",
2849 c->Request.CDB[0], c->err_info->CommandStatus);
4a4b2d76 2850 status = IO_ERROR;
3c2ab402 2851 break;
4a4b2d76
SC		 2852
2853 } while (1);
7c832835 2854
1da177e4 2855 /* unlock the data buffer from DMA */
bb2a37bf
MM		 2856 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2857 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
4a4b2d76 2858 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
7c832835 2859 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
4a4b2d76
SC		 2860 return status;
2861}
2862
2863/*
2864 * Send a command to the controller, and wait for it to complete.
2865 * Used at init time, and during SCSI error recovery.
2866 */
2867static int sendcmd(__u8 cmd, int ctlr, void *buff, size_t size,
4a4b2d76
SC		 2868 __u8 page_code, unsigned char *scsi3addr, int cmd_type)
2869{
2870 CommandList_struct *c;
2871 int status;
2872
2873 c = cmd_alloc(hba[ctlr], 1);
2874 if (!c) {
2875 printk(KERN_WARNING "cciss: unable to get memory");
2876 return IO_ERROR;
2877 }
b57695fe 2878 status = fill_cmd(c, cmd, ctlr, buff, size, page_code,
2879 scsi3addr, cmd_type);
4a4b2d76
SC		 2880 if (status == IO_OK)
2881 status = sendcmd_core(hba[ctlr], c);
2882 cmd_free(hba[ctlr], c, 1);
e2019b58 2883 return status;
7c832835
BH		 2884}
2885
1da177e4
LT		 2886/*
2887 * Map (physical) PCI mem into (virtual) kernel space
2888 */
2889static void __iomem *remap_pci_mem(ulong base, ulong size)
2890{
7c832835
BH		 2891 ulong page_base = ((ulong) base) & PAGE_MASK;
2892 ulong page_offs = ((ulong) base) - page_base;
2893 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 2894
7c832835 2895 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 2896}
2897
7c832835
BH		 2898/*
2899 * Takes jobs of the Q and sends them to the hardware, then puts it on
2900 * the Q to wait for completion.
2901 */
2902static void start_io(ctlr_info_t *h)
1da177e4
LT		 2903{
2904 CommandList_struct *c;
7c832835 2905
8a3173de
JA		 2906 while (!hlist_empty(&h->reqQ)) {
2907 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
1da177e4
LT		 2908 /* can't do anything if fifo is full */
2909 if ((h->access.fifo_full(h))) {
2910 printk(KERN_WARNING "cciss: fifo full\n");
2911 break;
2912 }
2913
7c832835 2914 /* Get the first entry from the Request Q */
8a3173de 2915 removeQ(c);
1da177e4 2916 h->Qdepth--;
7c832835
BH		 2917
2918 /* Tell the controller execute command */
1da177e4 2919 h->access.submit_command(h, c);
7c832835
BH		 2920
2921 /* Put job onto the completed Q */
8a3173de 2922 addQ(&h->cmpQ, c);
1da177e4
LT		 2923 }
2924}
7c832835 2925
1da177e4
LT		 2926/* Assumes that CCISS_LOCK(h->ctlr) is held. */
2927/* Zeros out the error record and then resends the command back */
2928/* to the controller */
7c832835 2929static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 2930{
2931 /* erase the old error information */
2932 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2933
2934 /* add it to software queue and then send it to the controller */
8a3173de 2935 addQ(&h->reqQ, c);
1da177e4 2936 h->Qdepth++;
7c832835 2937 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 2938 h->maxQsinceinit = h->Qdepth;
2939
2940 start_io(h);
2941}
a9925a06 2942
1a614f50
SC		 2943static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
2944 unsigned int msg_byte, unsigned int host_byte,
2945 unsigned int driver_byte)
2946{
2947 /* inverse of macros in scsi.h */
2948 return (scsi_status_byte & 0xff) |
2949 ((msg_byte & 0xff) << 8) |
2950 ((host_byte & 0xff) << 16) |
2951 ((driver_byte & 0xff) << 24);
2952}
2953
0a9279cc
MM		 2954static inline int evaluate_target_status(ctlr_info_t *h,
2955 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 2956{
2957 unsigned char sense_key;
1a614f50
SC		 2958 unsigned char status_byte, msg_byte, host_byte, driver_byte;
2959 int error_value;
2960
0a9279cc 2961 *retry_cmd = 0;
1a614f50
SC		 2962 /* If we get in here, it means we got "target status", that is, scsi status */
2963 status_byte = cmd->err_info->ScsiStatus;
2964 driver_byte = DRIVER_OK;
2965 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
2966
2967 if (blk_pc_request(cmd->rq))
2968 host_byte = DID_PASSTHROUGH;
2969 else
2970 host_byte = DID_OK;
2971
2972 error_value = make_status_bytes(status_byte, msg_byte,
2973 host_byte, driver_byte);
03bbfee5 2974
1a614f50 2975 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
03bbfee5
MMOD		 2976 if (!blk_pc_request(cmd->rq))
2977 printk(KERN_WARNING "cciss: cmd %p "
2978 "has SCSI Status 0x%x\n",
2979 cmd, cmd->err_info->ScsiStatus);
1a614f50 2980 return error_value;
03bbfee5
MMOD		 2981 }
2982
2983 /* check the sense key */
2984 sense_key = 0xf & cmd->err_info->SenseInfo[2];
2985 /* no status or recovered error */
1a614f50
SC		 2986 if (((sense_key == 0x0) || (sense_key == 0x1)) && !blk_pc_request(cmd->rq))
2987 error_value = 0;
03bbfee5 2988
0a9279cc
MM		 2989 if (check_for_unit_attention(h, cmd)) {
2990 *retry_cmd = !blk_pc_request(cmd->rq);
2991 return 0;
2992 }
2993
03bbfee5 2994 if (!blk_pc_request(cmd->rq)) { /* Not SG_IO or similar? */
1a614f50 2995 if (error_value != 0)
03bbfee5
MMOD		 2996 printk(KERN_WARNING "cciss: cmd %p has CHECK CONDITION"
2997 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 2998 return error_value;
03bbfee5
MMOD		 2999 }
3000
3001 /* SG_IO or similar, copy sense data back */
3002 if (cmd->rq->sense) {
3003 if (cmd->rq->sense_len > cmd->err_info->SenseLen)
3004 cmd->rq->sense_len = cmd->err_info->SenseLen;
3005 memcpy(cmd->rq->sense, cmd->err_info->SenseInfo,
3006 cmd->rq->sense_len);
3007 } else
3008 cmd->rq->sense_len = 0;
3009
1a614f50 3010 return error_value;
03bbfee5
MMOD		 3011}
3012
7c832835 3013/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3014 * buffers for the completed job. Note that this function does not need
3015 * to hold the hba/queue lock.
7c832835
BH		 3016 */
3017static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3018 int timeout)
1da177e4 3019{
1da177e4 3020 int retry_cmd = 0;
198b7660
MMOD		 3021 struct request *rq = cmd->rq;
3022
3023 rq->errors = 0;
7c832835 3024
1da177e4 3025 if (timeout)
1a614f50 3026 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3027
d38ae168
MMOD		 3028 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3029 goto after_error_processing;
7c832835 3030
d38ae168 3031 switch (cmd->err_info->CommandStatus) {
d38ae168 3032 case CMD_TARGET_STATUS:
0a9279cc 3033 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3034 break;
3035 case CMD_DATA_UNDERRUN:
03bbfee5
MMOD		 3036 if (blk_fs_request(cmd->rq)) {
3037 printk(KERN_WARNING "cciss: cmd %p has"
3038 " completed with data underrun "
3039 "reported\n", cmd);
c3a4d78c 3040 cmd->rq->resid_len = cmd->err_info->ResidualCnt;
03bbfee5 3041 }
d38ae168
MMOD		 3042 break;
3043 case CMD_DATA_OVERRUN:
03bbfee5
MMOD		 3044 if (blk_fs_request(cmd->rq))
3045 printk(KERN_WARNING "cciss: cmd %p has"
3046 " completed with data overrun "
3047 "reported\n", cmd);
d38ae168
MMOD		 3048 break;
3049 case CMD_INVALID:
3050 printk(KERN_WARNING "cciss: cmd %p is "
3051 "reported invalid\n", cmd);
1a614f50
SC		 3052 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3053 cmd->err_info->CommandStatus, DRIVER_OK,
3054 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3055 break;
3056 case CMD_PROTOCOL_ERR:
3057 printk(KERN_WARNING "cciss: cmd %p has "
3058 "protocol error \n", cmd);
1a614f50
SC		 3059 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3060 cmd->err_info->CommandStatus, DRIVER_OK,
3061 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3062 break;
3063 case CMD_HARDWARE_ERR:
3064 printk(KERN_WARNING "cciss: cmd %p had "
3065 " hardware error\n", cmd);
1a614f50
SC		 3066 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3067 cmd->err_info->CommandStatus, DRIVER_OK,
3068 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3069 break;
3070 case CMD_CONNECTION_LOST:
3071 printk(KERN_WARNING "cciss: cmd %p had "
3072 "connection lost\n", cmd);
1a614f50
SC		 3073 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3074 cmd->err_info->CommandStatus, DRIVER_OK,
3075 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3076 break;
3077 case CMD_ABORTED:
3078 printk(KERN_WARNING "cciss: cmd %p was "
3079 "aborted\n", cmd);
1a614f50
SC		 3080 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3081 cmd->err_info->CommandStatus, DRIVER_OK,
3082 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3083 break;
3084 case CMD_ABORT_FAILED:
3085 printk(KERN_WARNING "cciss: cmd %p reports "
3086 "abort failed\n", cmd);
1a614f50
SC		 3087 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3088 cmd->err_info->CommandStatus, DRIVER_OK,
3089 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3090 break;
3091 case CMD_UNSOLICITED_ABORT:
3092 printk(KERN_WARNING "cciss%d: unsolicited "
3093 "abort %p\n", h->ctlr, cmd);
3094 if (cmd->retry_count < MAX_CMD_RETRIES) {
3095 retry_cmd = 1;
3096 printk(KERN_WARNING
3097 "cciss%d: retrying %p\n", h->ctlr, cmd);
3098 cmd->retry_count++;
3099 } else
3100 printk(KERN_WARNING
3101 "cciss%d: %p retried too "
3102 "many times\n", h->ctlr, cmd);
1a614f50
SC		 3103 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3104 cmd->err_info->CommandStatus, DRIVER_OK,
3105 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3106 break;
3107 case CMD_TIMEOUT:
3108 printk(KERN_WARNING "cciss: cmd %p timedout\n", cmd);
1a614f50
SC		 3109 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3110 cmd->err_info->CommandStatus, DRIVER_OK,
3111 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3112 break;
3113 default:
3114 printk(KERN_WARNING "cciss: cmd %p returned "
3115 "unknown status %x\n", cmd,
3116 cmd->err_info->CommandStatus);
1a614f50
SC		 3117 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3118 cmd->err_info->CommandStatus, DRIVER_OK,
3119 blk_pc_request(cmd->rq) ? DID_PASSTHROUGH : DID_ERROR);
1da177e4 3120 }
d38ae168
MMOD		 3121
3122after_error_processing:
3123
1da177e4 3124 /* We need to return this command */
7c832835
BH		 3125 if (retry_cmd) {
3126 resend_cciss_cmd(h, cmd);
1da177e4 3127 return;
7c832835 3128 }
03bbfee5 3129 cmd->rq->completion_data = cmd;
a9925a06 3130 blk_complete_request(cmd->rq);
1da177e4
LT		 3131}
3132
7c832835
BH		 3133/*
3134 * Get a request and submit it to the controller.
1da177e4 3135 */
165125e1 3136static void do_cciss_request(struct request_queue *q)
1da177e4 3137{
7c832835 3138 ctlr_info_t *h = q->queuedata;
1da177e4 3139 CommandList_struct *c;
00988a35
MMOD		 3140 sector_t start_blk;
3141 int seg;
1da177e4
LT		 3142 struct request *creq;
3143 u64bit temp64;
3144 struct scatterlist tmp_sg[MAXSGENTRIES];
3145 drive_info_struct *drv;
3146 int i, dir;
3147
3148 /* We call start_io here in case there is a command waiting on the
3149 * queue that has not been sent.
7c832835 3150 */
1da177e4
LT		 3151 if (blk_queue_plugged(q))
3152 goto startio;
3153
7c832835 3154 queue:
9934c8c0 3155 creq = blk_peek_request(q);
1da177e4
LT		 3156 if (!creq)
3157 goto startio;
3158
089fe1b2 3159 BUG_ON(creq->nr_phys_segments > MAXSGENTRIES);
1da177e4 3160
7c832835 3161 if ((c = cmd_alloc(h, 1)) == NULL)
1da177e4
LT		 3162 goto full;
3163
9934c8c0 3164 blk_start_request(creq);
1da177e4
LT		 3165
3166 spin_unlock_irq(q->queue_lock);
3167
3168 c->cmd_type = CMD_RWREQ;
3169 c->rq = creq;
7c832835
BH		 3170
3171 /* fill in the request */
1da177e4 3172 drv = creq->rq_disk->private_data;
7c832835 3173 c->Header.ReplyQueue = 0; // unused in simple mode
33079b21
MM		 3174 /* got command from pool, so use the command block index instead */
3175 /* for direct lookups. */
3176 /* The first 2 bits are reserved for controller error reporting. */
3177 c->Header.Tag.lower = (c->cmdindex << 3);
7c832835
BH		 3178 c->Header.Tag.lower |= 0x04; /* flag for direct lookup. */
3179 c->Header.LUN.LogDev.VolId = drv->LunID;
1da177e4 3180 c->Header.LUN.LogDev.Mode = 1;
7c832835
BH		 3181 c->Request.CDBLen = 10; // 12 byte commands not in FW yet;
3182 c->Request.Type.Type = TYPE_CMD; // It is a command.
3183 c->Request.Type.Attribute = ATTR_SIMPLE;
3184 c->Request.Type.Direction =
a52de245 3185 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
7c832835
BH		 3186 c->Request.Timeout = 0; // Don't time out
3187 c->Request.CDB[0] =
00988a35 3188 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3189 start_blk = blk_rq_pos(creq);
1da177e4 3190#ifdef CCISS_DEBUG
83096ebf
TH		 3191 printk(KERN_DEBUG "ciss: sector =%d nr_sectors=%d\n",
3192 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
7c832835 3193#endif /* CCISS_DEBUG */
1da177e4 3194
45711f1a 3195 sg_init_table(tmp_sg, MAXSGENTRIES);
1da177e4
LT		 3196 seg = blk_rq_map_sg(q, creq, tmp_sg);
3197
7c832835 3198 /* get the DMA records for the setup */
1da177e4
LT		 3199 if (c->Request.Type.Direction == XFER_READ)
3200 dir = PCI_DMA_FROMDEVICE;
3201 else
3202 dir = PCI_DMA_TODEVICE;
3203
7c832835 3204 for (i = 0; i < seg; i++) {
1da177e4 3205 c->SG[i].Len = tmp_sg[i].length;
45711f1a 3206 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
7c832835
BH		 3207 tmp_sg[i].offset,
3208 tmp_sg[i].length, dir);
1da177e4 3209 c->SG[i].Addr.lower = temp64.val32.lower;
7c832835
BH		 3210 c->SG[i].Addr.upper = temp64.val32.upper;
3211 c->SG[i].Ext = 0; // we are not chaining
1da177e4 3212 }
7c832835
BH		 3213 /* track how many SG entries we are using */
3214 if (seg > h->maxSG)
3215 h->maxSG = seg;
1da177e4
LT		 3216
3217#ifdef CCISS_DEBUG
83096ebf
TH		 3218 printk(KERN_DEBUG "cciss: Submitting %u sectors in %d segments\n",
3219 blk_rq_sectors(creq), seg);
7c832835 3220#endif /* CCISS_DEBUG */
1da177e4
LT		 3221
3222 c->Header.SGList = c->Header.SGTotal = seg;
03bbfee5
MMOD		 3223 if (likely(blk_fs_request(creq))) {
3224 if(h->cciss_read == CCISS_READ_10) {
3225 c->Request.CDB[1] = 0;
3226 c->Request.CDB[2] = (start_blk >> 24) & 0xff; //MSB
3227 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3228 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3229 c->Request.CDB[5] = start_blk & 0xff;
3230 c->Request.CDB[6] = 0; // (sect >> 24) & 0xff; MSB
83096ebf
TH		 3231 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3232 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3233 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3234 } else {
582539e5
RD		 3235 u32 upper32 = upper_32_bits(start_blk);
3236
03bbfee5
MMOD		 3237 c->Request.CDBLen = 16;
3238 c->Request.CDB[1]= 0;
582539e5
RD		 3239 c->Request.CDB[2]= (upper32 >> 24) & 0xff; //MSB
3240 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3241 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3242 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3243 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3244 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3245 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3246 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3247 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3248 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3249 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3250 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3251 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3252 }
3253 } else if (blk_pc_request(creq)) {
3254 c->Request.CDBLen = creq->cmd_len;
3255 memcpy(c->Request.CDB, creq->cmd, BLK_MAX_CDB);
00988a35 3256 } else {
03bbfee5
MMOD		 3257 printk(KERN_WARNING "cciss%d: bad request type %d\n", h->ctlr, creq->cmd_type);
3258 BUG();
00988a35 3259 }
1da177e4
LT		 3260
3261 spin_lock_irq(q->queue_lock);
3262
8a3173de 3263 addQ(&h->reqQ, c);
1da177e4 3264 h->Qdepth++;
7c832835
BH		 3265 if (h->Qdepth > h->maxQsinceinit)
3266 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3267
3268 goto queue;
00988a35 3269full:
1da177e4 3270 blk_stop_queue(q);
00988a35 3271startio:
1da177e4
LT		 3272 /* We will already have the driver lock here so not need
3273 * to lock it.
7c832835 3274 */
1da177e4
LT		 3275 start_io(h);
3276}
3277
3da8b713 3278static inline unsigned long get_next_completion(ctlr_info_t *h)
3279{
3da8b713 3280 return h->access.command_completed(h);
3da8b713 3281}
3282
3283static inline int interrupt_pending(ctlr_info_t *h)
3284{
3da8b713 3285 return h->access.intr_pending(h);
3da8b713 3286}
3287
3288static inline long interrupt_not_for_us(ctlr_info_t *h)
3289{
7c832835 3290 return (((h->access.intr_pending(h) == 0) ||
3da8b713 3291 (h->interrupts_enabled == 0)));
3da8b713 3292}
3293
7d12e780 3294static irqreturn_t do_cciss_intr(int irq, void *dev_id)
1da177e4
LT		 3295{
3296 ctlr_info_t *h = dev_id;
3297 CommandList_struct *c;
3298 unsigned long flags;
33079b21 3299 __u32 a, a1, a2;
1da177e4 3300
3da8b713 3301 if (interrupt_not_for_us(h))
1da177e4 3302 return IRQ_NONE;
1da177e4
LT		 3303 /*
3304 * If there are completed commands in the completion queue,
3305 * we had better do something about it.
3306 */
3307 spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
3da8b713 3308 while (interrupt_pending(h)) {
7c832835 3309 while ((a = get_next_completion(h)) != FIFO_EMPTY) {
1da177e4 3310 a1 = a;
33079b21
MM		 3311 if ((a & 0x04)) {
3312 a2 = (a >> 3);
f880632f 3313 if (a2 >= h->nr_cmds) {
7c832835
BH		 3314 printk(KERN_WARNING
3315 "cciss: controller cciss%d failed, stopping.\n",
3316 h->ctlr);
33079b21
MM		 3317 fail_all_cmds(h->ctlr);
3318 return IRQ_HANDLED;
3319 }
3320
3321 c = h->cmd_pool + a2;
3322 a = c->busaddr;
3323
3324 } else {
8a3173de
JA		 3325 struct hlist_node *tmp;
3326
7c832835 3327 a &= ~3;
8a3173de
JA		 3328 c = NULL;
3329 hlist_for_each_entry(c, tmp, &h->cmpQ, list) {
3330 if (c->busaddr == a)
7c832835
BH		 3331 break;
3332 }
33079b21 3333 }
1da177e4
LT		 3334 /*
3335 * If we've found the command, take it off the
3336 * completion Q and free it
3337 */
8a3173de
JA		 3338 if (c && c->busaddr == a) {
3339 removeQ(c);
1da177e4
LT		 3340 if (c->cmd_type == CMD_RWREQ) {
3341 complete_command(h, c, 0);
3342 } else if (c->cmd_type == CMD_IOCTL_PEND) {
3343 complete(c->waiting);
3344 }
3345# ifdef CONFIG_CISS_SCSI_TAPE
3346 else if (c->cmd_type == CMD_SCSI)
3347 complete_scsi_command(c, 0, a1);
3348# endif
3349 continue;
3350 }
3351 }
3352 }
3353
1da177e4
LT		 3354 spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
3355 return IRQ_HANDLED;
3356}
7c832835 3357
b368c9dd
AP		 3358/**
3359 * add_to_scan_list() - add controller to rescan queue
3360 * @h: Pointer to the controller.
3361 *
3362 * Adds the controller to the rescan queue if not already on the queue.
3363 *
3364 * returns 1 if added to the queue, 0 if skipped (could be on the
3365 * queue already, or the controller could be initializing or shutting
3366 * down).
3367 **/
3368static int add_to_scan_list(struct ctlr_info *h)
3369{
3370 struct ctlr_info *test_h;
3371 int found = 0;
3372 int ret = 0;
3373
3374 if (h->busy_initializing)
3375 return 0;
3376
3377 if (!mutex_trylock(&h->busy_shutting_down))
3378 return 0;
3379
3380 mutex_lock(&scan_mutex);
3381 list_for_each_entry(test_h, &scan_q, scan_list) {
3382 if (test_h == h) {
3383 found = 1;
3384 break;
3385 }
3386 }
3387 if (!found && !h->busy_scanning) {
3388 INIT_COMPLETION(h->scan_wait);
3389 list_add_tail(&h->scan_list, &scan_q);
3390 ret = 1;
3391 }
3392 mutex_unlock(&scan_mutex);
3393 mutex_unlock(&h->busy_shutting_down);
3394
3395 return ret;
3396}
3397
3398/**
3399 * remove_from_scan_list() - remove controller from rescan queue
3400 * @h: Pointer to the controller.
3401 *
3402 * Removes the controller from the rescan queue if present. Blocks if
3403 * the controller is currently conducting a rescan.
3404 **/
3405static void remove_from_scan_list(struct ctlr_info *h)
3406{
3407 struct ctlr_info *test_h, *tmp_h;
3408 int scanning = 0;
3409
3410 mutex_lock(&scan_mutex);
3411 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
3412 if (test_h == h) {
3413 list_del(&h->scan_list);
3414 complete_all(&h->scan_wait);
3415 mutex_unlock(&scan_mutex);
3416 return;
3417 }
3418 }
3419 if (&h->busy_scanning)
3420 scanning = 0;
3421 mutex_unlock(&scan_mutex);
3422
3423 if (scanning)
3424 wait_for_completion(&h->scan_wait);
3425}
3426
3427/**
3428 * scan_thread() - kernel thread used to rescan controllers
3429 * @data: Ignored.
3430 *
3431 * A kernel thread used scan for drive topology changes on
3432 * controllers. The thread processes only one controller at a time
3433 * using a queue. Controllers are added to the queue using
3434 * add_to_scan_list() and removed from the queue either after done
3435 * processing or using remove_from_scan_list().
3436 *
3437 * returns 0.
3438 **/
0a9279cc
MM		 3439static int scan_thread(void *data)
3440{
b368c9dd 3441 struct ctlr_info *h;
0a9279cc 3442
b368c9dd
AP		 3443 while (1) {
3444 set_current_state(TASK_INTERRUPTIBLE);
3445 schedule();
0a9279cc
MM		 3446 if (kthread_should_stop())
3447 break;
b368c9dd
AP		 3448
3449 while (1) {
3450 mutex_lock(&scan_mutex);
3451 if (list_empty(&scan_q)) {
3452 mutex_unlock(&scan_mutex);
3453 break;
3454 }
3455
3456 h = list_entry(scan_q.next,
3457 struct ctlr_info,
3458 scan_list);
3459 list_del(&h->scan_list);
3460 h->busy_scanning = 1;
3461 mutex_unlock(&scan_mutex);
3462
3463 if (h) {
2d11d993 3464 rebuild_lun_table(h, 0, 0);
b368c9dd
AP		 3465 complete_all(&h->scan_wait);
3466 mutex_lock(&scan_mutex);
3467 h->busy_scanning = 0;
3468 mutex_unlock(&scan_mutex);
3469 }
3470 }
0a9279cc 3471 }
b368c9dd 3472
0a9279cc
MM		 3473 return 0;
3474}
3475
3476static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3477{
3478 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3479 return 0;
3480
3481 switch (c->err_info->SenseInfo[12]) {
3482 case STATE_CHANGED:
3483 printk(KERN_WARNING "cciss%d: a state change "
3484 "detected, command retried\n", h->ctlr);
3485 return 1;
3486 break;
3487 case LUN_FAILED:
3488 printk(KERN_WARNING "cciss%d: LUN failure "
3489 "detected, action required\n", h->ctlr);
3490 return 1;
3491 break;
3492 case REPORT_LUNS_CHANGED:
3493 printk(KERN_WARNING "cciss%d: report LUN data "
3494 "changed\n", h->ctlr);
b368c9dd
AP		 3495 add_to_scan_list(h);
3496 wake_up_process(cciss_scan_thread);
0a9279cc
MM		 3497 return 1;
3498 break;
3499 case POWER_OR_RESET:
3500 printk(KERN_WARNING "cciss%d: a power on "
3501 "or device reset detected\n", h->ctlr);
3502 return 1;
3503 break;
3504 case UNIT_ATTENTION_CLEARED:
3505 printk(KERN_WARNING "cciss%d: unit attention "
3506 "cleared by another initiator\n", h->ctlr);
3507 return 1;
3508 break;
3509 default:
3510 printk(KERN_WARNING "cciss%d: unknown "
3511 "unit attention detected\n", h->ctlr);
3512 return 1;
3513 }
3514}
3515
7c832835 3516/*
d14c4ab5 3517 * We cannot read the structure directly, for portability we must use
1da177e4 3518 * the io functions.
7c832835 3519 * This is for debug only.
1da177e4
LT		 3520 */
3521#ifdef CCISS_DEBUG
7c832835 3522static void print_cfg_table(CfgTable_struct *tb)
1da177e4
LT		 3523{
3524 int i;
3525 char temp_name[17];
3526
3527 printk("Controller Configuration information\n");
3528 printk("------------------------------------\n");
7c832835 3529 for (i = 0; i < 4; i++)
1da177e4 3530 temp_name[i] = readb(&(tb->Signature[i]));
7c832835
BH		 3531 temp_name[4] = '\0';
3532 printk(" Signature = %s\n", temp_name);
1da177e4 3533 printk(" Spec Number = %d\n", readl(&(tb->SpecValence)));
7c832835
BH		 3534 printk(" Transport methods supported = 0x%x\n",
3535 readl(&(tb->TransportSupport)));
3536 printk(" Transport methods active = 0x%x\n",
3537 readl(&(tb->TransportActive)));
3538 printk(" Requested transport Method = 0x%x\n",
3539 readl(&(tb->HostWrite.TransportRequest)));
d14c4ab5 3540 printk(" Coalesce Interrupt Delay = 0x%x\n",
7c832835 3541 readl(&(tb->HostWrite.CoalIntDelay)));
d14c4ab5 3542 printk(" Coalesce Interrupt Count = 0x%x\n",
7c832835
BH		 3543 readl(&(tb->HostWrite.CoalIntCount)));
3544 printk(" Max outstanding commands = 0x%d\n",
3545 readl(&(tb->CmdsOutMax)));
3546 printk(" Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
3547 for (i = 0; i < 16; i++)
1da177e4
LT		 3548 temp_name[i] = readb(&(tb->ServerName[i]));
3549 temp_name[16] = '\0';
3550 printk(" Server Name = %s\n", temp_name);
7c832835 3551 printk(" Heartbeat Counter = 0x%x\n\n\n", readl(&(tb->HeartBeat)));
1da177e4 3552}
7c832835 3553#endif /* CCISS_DEBUG */
1da177e4 3554
7c832835 3555static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3556{
3557 int i, offset, mem_type, bar_type;
7c832835 3558 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3559 return 0;
3560 offset = 0;
7c832835
BH		 3561 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3562 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3563 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3564 offset += 4;
3565 else {
3566 mem_type = pci_resource_flags(pdev, i) &
7c832835 3567 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3568 switch (mem_type) {
7c832835
BH		 3569 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3570 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3571 offset += 4; /* 32 bit */
3572 break;
3573 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3574 offset += 8;
3575 break;
3576 default: /* reserved in PCI 2.2 */
3577 printk(KERN_WARNING
3578 "Base address is invalid\n");
3579 return -1;
1da177e4
LT		 3580 break;
3581 }
3582 }
7c832835
BH		 3583 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3584 return i + 1;
1da177e4
LT		 3585 }
3586 return -1;
3587}
3588
fb86a35b
MM		 3589/* If MSI/MSI-X is supported by the kernel we will try to enable it on
3590 * controllers that are capable. If not, we use IO-APIC mode.
3591 */
3592
7c832835
BH		 3593static void __devinit cciss_interrupt_mode(ctlr_info_t *c,
3594 struct pci_dev *pdev, __u32 board_id)
fb86a35b
MM		 3595{
3596#ifdef CONFIG_PCI_MSI
7c832835
BH		 3597 int err;
3598 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
3599 {0, 2}, {0, 3}
3600 };
fb86a35b
MM		 3601
3602 /* Some boards advertise MSI but don't really support it */
3603 if ((board_id == 0x40700E11) ||
7c832835
BH		 3604 (board_id == 0x40800E11) ||
3605 (board_id == 0x40820E11) || (board_id == 0x40830E11))
fb86a35b
MM		 3606 goto default_int_mode;
3607
7c832835
BH		 3608 if (pci_find_capability(pdev, PCI_CAP_ID_MSIX)) {
3609 err = pci_enable_msix(pdev, cciss_msix_entries, 4);
3610 if (!err) {
3611 c->intr[0] = cciss_msix_entries[0].vector;
3612 c->intr[1] = cciss_msix_entries[1].vector;
3613 c->intr[2] = cciss_msix_entries[2].vector;
3614 c->intr[3] = cciss_msix_entries[3].vector;
3615 c->msix_vector = 1;
3616 return;
3617 }
3618 if (err > 0) {
3619 printk(KERN_WARNING "cciss: only %d MSI-X vectors "
3620 "available\n", err);
1ecb9c0f 3621 goto default_int_mode;
7c832835
BH		 3622 } else {
3623 printk(KERN_WARNING "cciss: MSI-X init failed %d\n",
3624 err);
1ecb9c0f 3625 goto default_int_mode;
7c832835
BH		 3626 }
3627 }
3628 if (pci_find_capability(pdev, PCI_CAP_ID_MSI)) {
3629 if (!pci_enable_msi(pdev)) {
7c832835 3630 c->msi_vector = 1;
7c832835
BH		 3631 } else {
3632 printk(KERN_WARNING "cciss: MSI init failed\n");
7c832835
BH		 3633 }
3634 }
1ecb9c0f 3635default_int_mode:
7c832835 3636#endif /* CONFIG_PCI_MSI */
fb86a35b 3637 /* if we get here we're going to use the default interrupt mode */
7c832835 3638 c->intr[SIMPLE_MODE_INT] = pdev->irq;
fb86a35b
MM		 3639 return;
3640}
3641
7d1fd970 3642static int __devinit cciss_pci_init(ctlr_info_t *c, struct pci_dev *pdev)
1da177e4
LT		 3643{
3644 ushort subsystem_vendor_id, subsystem_device_id, command;
3645 __u32 board_id, scratchpad = 0;
3646 __u64 cfg_offset;
3647 __u32 cfg_base_addr;
3648 __u64 cfg_base_addr_index;
c33ac89b 3649 int i, err;
1da177e4
LT		 3650
3651 /* check to see if controller has been disabled */
3652 /* BEFORE trying to enable it */
7c832835
BH		 3653 (void)pci_read_config_word(pdev, PCI_COMMAND, &command);
3654 if (!(command & 0x02)) {
3655 printk(KERN_WARNING
3656 "cciss: controller appears to be disabled\n");
c33ac89b 3657 return -ENODEV;
1da177e4
LT		 3658 }
3659
c33ac89b 3660 err = pci_enable_device(pdev);
7c832835 3661 if (err) {
1da177e4 3662 printk(KERN_ERR "cciss: Unable to Enable PCI device\n");
c33ac89b 3663 return err;
1da177e4 3664 }
1da177e4 3665
4e570309
BH		 3666 err = pci_request_regions(pdev, "cciss");
3667 if (err) {
3668 printk(KERN_ERR "cciss: Cannot obtain PCI resources, "
7c832835 3669 "aborting\n");
872225ca 3670 return err;
4e570309
BH		 3671 }
3672
1da177e4
LT		 3673 subsystem_vendor_id = pdev->subsystem_vendor;
3674 subsystem_device_id = pdev->subsystem_device;
3675 board_id = (((__u32) (subsystem_device_id << 16) & 0xffff0000) |
7c832835 3676 subsystem_vendor_id);
1da177e4 3677
1da177e4
LT		 3678#ifdef CCISS_DEBUG
3679 printk("command = %x\n", command);
3680 printk("irq = %x\n", pdev->irq);
3681 printk("board_id = %x\n", board_id);
7c832835 3682#endif /* CCISS_DEBUG */
1da177e4 3683
fb86a35b
MM		 3684/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
3685 * else we use the IO-APIC interrupt assigned to us by system ROM.
3686 */
3687 cciss_interrupt_mode(c, pdev, board_id);
1da177e4 3688
e1438581
MM		 3689 /* find the memory BAR */
3690 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3691 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM)
3692 break;
3693 }
3694 if (i == DEVICE_COUNT_RESOURCE) {
3695 printk(KERN_WARNING "cciss: No memory BAR found\n");
3696 err = -ENODEV;
3697 goto err_out_free_res;
3698 }
3699
3700 c->paddr = pci_resource_start(pdev, i); /* addressing mode bits
3701 * already removed
3702 */
1da177e4 3703
1da177e4 3704#ifdef CCISS_DEBUG
9f92f471 3705 printk("address 0 = %lx\n", c->paddr);
7c832835 3706#endif /* CCISS_DEBUG */
a5b92873 3707 c->vaddr = remap_pci_mem(c->paddr, 0x250);
1da177e4
LT		 3708
3709 /* Wait for the board to become ready. (PCI hotplug needs this.)
3710 * We poll for up to 120 secs, once per 100ms. */
7c832835 3711 for (i = 0; i < 1200; i++) {
1da177e4
LT		 3712 scratchpad = readl(c->vaddr + SA5_SCRATCHPAD_OFFSET);
3713 if (scratchpad == CCISS_FIRMWARE_READY)
3714 break;
3715 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3716 schedule_timeout(msecs_to_jiffies(100)); /* wait 100ms */
1da177e4
LT		 3717 }
3718 if (scratchpad != CCISS_FIRMWARE_READY) {
3719 printk(KERN_WARNING "cciss: Board not ready. Timed out.\n");
c33ac89b 3720 err = -ENODEV;
4e570309 3721 goto err_out_free_res;
1da177e4
LT		 3722 }
3723
3724 /* get the address index number */
3725 cfg_base_addr = readl(c->vaddr + SA5_CTCFG_OFFSET);
3726 cfg_base_addr &= (__u32) 0x0000ffff;
3727#ifdef CCISS_DEBUG
3728 printk("cfg base address = %x\n", cfg_base_addr);
7c832835
BH		 3729#endif /* CCISS_DEBUG */
3730 cfg_base_addr_index = find_PCI_BAR_index(pdev, cfg_base_addr);
1da177e4 3731#ifdef CCISS_DEBUG
9f92f471
RD		 3732 printk("cfg base address index = %llx\n",
3733 (unsigned long long)cfg_base_addr_index);
7c832835 3734#endif /* CCISS_DEBUG */
1da177e4
LT		 3735 if (cfg_base_addr_index == -1) {
3736 printk(KERN_WARNING "cciss: Cannot find cfg_base_addr_index\n");
c33ac89b 3737 err = -ENODEV;
4e570309 3738 goto err_out_free_res;
1da177e4
LT		 3739 }
3740
3741 cfg_offset = readl(c->vaddr + SA5_CTMEM_OFFSET);
3742#ifdef CCISS_DEBUG
9f92f471 3743 printk("cfg offset = %llx\n", (unsigned long long)cfg_offset);
7c832835
BH		 3744#endif /* CCISS_DEBUG */
3745 c->cfgtable = remap_pci_mem(pci_resource_start(pdev,
3746 cfg_base_addr_index) +
3747 cfg_offset, sizeof(CfgTable_struct));
1da177e4
LT		 3748 c->board_id = board_id;
3749
3750#ifdef CCISS_DEBUG
945f390f 3751 print_cfg_table(c->cfgtable);
7c832835 3752#endif /* CCISS_DEBUG */
1da177e4 3753
49153998
MM		 3754 /* Some controllers support Zero Memory Raid (ZMR).
3755 * When configured in ZMR mode the number of supported
3756 * commands drops to 64. So instead of just setting an
3757 * arbitrary value we make the driver a little smarter.
3758 * We read the config table to tell us how many commands
3759 * are supported on the controller then subtract 4 to
3760 * leave a little room for ioctl calls.
3761 */
3762 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835 3763 for (i = 0; i < ARRAY_SIZE(products); i++) {
1da177e4
LT		 3764 if (board_id == products[i].board_id) {
3765 c->product_name = products[i].product_name;
3766 c->access = *(products[i].access);
49153998 3767 c->nr_cmds = c->max_commands - 4;
1da177e4
LT		 3768 break;
3769 }
3770 }
7c832835
BH		 3771 if ((readb(&c->cfgtable->Signature[0]) != 'C') ||
3772 (readb(&c->cfgtable->Signature[1]) != 'I') ||
3773 (readb(&c->cfgtable->Signature[2]) != 'S') ||
3774 (readb(&c->cfgtable->Signature[3]) != 'S')) {
1da177e4 3775 printk("Does not appear to be a valid CISS config table\n");
c33ac89b 3776 err = -ENODEV;
4e570309 3777 goto err_out_free_res;
1da177e4 3778 }
4ff9a9a4
MM		 3779 /* We didn't find the controller in our list. We know the
3780 * signature is valid. If it's an HP device let's try to
3781 * bind to the device and fire it up. Otherwise we bail.
3782 */
3783 if (i == ARRAY_SIZE(products)) {
3784 if (subsystem_vendor_id == PCI_VENDOR_ID_HP) {
3785 c->product_name = products[i-1].product_name;
3786 c->access = *(products[i-1].access);
49153998 3787 c->nr_cmds = c->max_commands - 4;
4ff9a9a4
MM		 3788 printk(KERN_WARNING "cciss: This is an unknown "
3789 "Smart Array controller.\n"
3790 "cciss: Please update to the latest driver "
3791 "available from www.hp.com.\n");
3792 } else {
3793 printk(KERN_WARNING "cciss: Sorry, I don't know how"
3794 " to access the Smart Array controller %08lx\n"
3795 , (unsigned long)board_id);
3796 err = -ENODEV;
3797 goto err_out_free_res;
3798 }
3799 }
1da177e4 3800#ifdef CONFIG_X86
7c832835
BH		 3801 {
3802 /* Need to enable prefetch in the SCSI core for 6400 in x86 */
3803 __u32 prefetch;
3804 prefetch = readl(&(c->cfgtable->SCSI_Prefetch));
3805 prefetch |= 0x100;
3806 writel(prefetch, &(c->cfgtable->SCSI_Prefetch));
3807 }
1da177e4
LT		 3808#endif
3809
8bf50f71
MMOD		 3810 /* Disabling DMA prefetch and refetch for the P600.
3811 * An ASIC bug may result in accesses to invalid memory addresses.
3812 * We've disabled prefetch for some time now. Testing with XEN
3813 * kernels revealed a bug in the refetch if dom0 resides on a P600.
f92e2f5f
MM		 3814 */
3815 if(board_id == 0x3225103C) {
3816 __u32 dma_prefetch;
8bf50f71 3817 __u32 dma_refetch;
f92e2f5f
MM		 3818 dma_prefetch = readl(c->vaddr + I2O_DMA1_CFG);
3819 dma_prefetch |= 0x8000;
3820 writel(dma_prefetch, c->vaddr + I2O_DMA1_CFG);
8bf50f71
MMOD		 3821 pci_read_config_dword(pdev, PCI_COMMAND_PARITY, &dma_refetch);
3822 dma_refetch |= 0x1;
3823 pci_write_config_dword(pdev, PCI_COMMAND_PARITY, dma_refetch);
f92e2f5f
MM		 3824 }
3825
1da177e4
LT		 3826#ifdef CCISS_DEBUG
3827 printk("Trying to put board into Simple mode\n");
7c832835 3828#endif /* CCISS_DEBUG */
1da177e4 3829 c->max_commands = readl(&(c->cfgtable->CmdsOutMax));
7c832835
BH		 3830 /* Update the field, and then ring the doorbell */
3831 writel(CFGTBL_Trans_Simple, &(c->cfgtable->HostWrite.TransportRequest));
3832 writel(CFGTBL_ChangeReq, c->vaddr + SA5_DOORBELL);
1da177e4
LT		 3833
3834 /* under certain very rare conditions, this can take awhile.
3835 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3836 * as we enter this code.) */
7c832835 3837 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
1da177e4
LT		 3838 if (!(readl(c->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3839 break;
3840 /* delay and try again */
3841 set_current_state(TASK_INTERRUPTIBLE);
4d761609 3842 schedule_timeout(msecs_to_jiffies(1));
7c832835 3843 }
1da177e4
LT		 3844
3845#ifdef CCISS_DEBUG
7c832835
BH		 3846 printk(KERN_DEBUG "I counter got to %d %x\n", i,
3847 readl(c->vaddr + SA5_DOORBELL));
3848#endif /* CCISS_DEBUG */
1da177e4 3849#ifdef CCISS_DEBUG
7c832835
BH		 3850 print_cfg_table(c->cfgtable);
3851#endif /* CCISS_DEBUG */
1da177e4 3852
7c832835 3853 if (!(readl(&(c->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
1da177e4 3854 printk(KERN_WARNING "cciss: unable to get board into"
7c832835 3855 " simple mode\n");
c33ac89b 3856 err = -ENODEV;
4e570309 3857 goto err_out_free_res;
1da177e4
LT		 3858 }
3859 return 0;
3860
5faad620 3861err_out_free_res:
872225ca
MM		 3862 /*
3863 * Deliberately omit pci_disable_device(): it does something nasty to
3864 * Smart Array controllers that pci_enable_device does not undo
3865 */
4e570309 3866 pci_release_regions(pdev);
c33ac89b 3867 return err;
1da177e4
LT		 3868}
3869
6ae5ce8e
MM		 3870/* Function to find the first free pointer into our hba[] array
3871 * Returns -1 if no free entries are left.
7c832835 3872 */
1da177e4
LT		 3873static int alloc_cciss_hba(void)
3874{
799202cb 3875 int i;
1da177e4 3876
7c832835 3877 for (i = 0; i < MAX_CTLR; i++) {
1da177e4
LT		 3878 if (!hba[i]) {
3879 ctlr_info_t *p;
f2912a12 3880
06ff37ff 3881 p = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
1da177e4
LT		 3882 if (!p)
3883 goto Enomem;
1da177e4
LT		 3884 hba[i] = p;
3885 return i;
3886 }
3887 }
3888 printk(KERN_WARNING "cciss: This driver supports a maximum"
7c832835 3889 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 3890 return -1;
3891Enomem:
1da177e4 3892 printk(KERN_ERR "cciss: out of memory.\n");
1da177e4
LT		 3893 return -1;
3894}
3895
3896static void free_hba(int i)
3897{
3898 ctlr_info_t *p = hba[i];
3899 int n;
3900
3901 hba[i] = NULL;
799202cb 3902 for (n = 0; n < CISS_MAX_LUN; n++)
1da177e4
LT		 3903 put_disk(p->gendisk[n]);
3904 kfree(p);
3905}
3906
82eb03cf
CC		 3907/* Send a message CDB to the firmware. */
3908static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type)
3909{
3910 typedef struct {
3911 CommandListHeader_struct CommandHeader;
3912 RequestBlock_struct Request;
3913 ErrDescriptor_struct ErrorDescriptor;
3914 } Command;
3915 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
3916 Command *cmd;
3917 dma_addr_t paddr64;
3918 uint32_t paddr32, tag;
3919 void __iomem *vaddr;
3920 int i, err;
3921
3922 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
3923 if (vaddr == NULL)
3924 return -ENOMEM;
3925
3926 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
3927 CCISS commands, so they must be allocated from the lower 4GiB of
3928 memory. */
e930438c 3929 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 3930 if (err) {
3931 iounmap(vaddr);
3932 return -ENOMEM;
3933 }
3934
3935 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
3936 if (cmd == NULL) {
3937 iounmap(vaddr);
3938 return -ENOMEM;
3939 }
3940
3941 /* This must fit, because of the 32-bit consistent DMA mask. Also,
3942 although there's no guarantee, we assume that the address is at
3943 least 4-byte aligned (most likely, it's page-aligned). */
3944 paddr32 = paddr64;
3945
3946 cmd->CommandHeader.ReplyQueue = 0;
3947 cmd->CommandHeader.SGList = 0;
3948 cmd->CommandHeader.SGTotal = 0;
3949 cmd->CommandHeader.Tag.lower = paddr32;
3950 cmd->CommandHeader.Tag.upper = 0;
3951 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
3952
3953 cmd->Request.CDBLen = 16;
3954 cmd->Request.Type.Type = TYPE_MSG;
3955 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
3956 cmd->Request.Type.Direction = XFER_NONE;
3957 cmd->Request.Timeout = 0; /* Don't time out */
3958 cmd->Request.CDB[0] = opcode;
3959 cmd->Request.CDB[1] = type;
3960 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
3961
3962 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
3963 cmd->ErrorDescriptor.Addr.upper = 0;
3964 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
3965
3966 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
3967
3968 for (i = 0; i < 10; i++) {
3969 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
3970 if ((tag & ~3) == paddr32)
3971 break;
3972 schedule_timeout_uninterruptible(HZ);
3973 }
3974
3975 iounmap(vaddr);
3976
3977 /* we leak the DMA buffer here ... no choice since the controller could
3978 still complete the command. */
3979 if (i == 10) {
3980 printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n",
3981 opcode, type);
3982 return -ETIMEDOUT;
3983 }
3984
3985 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
3986
3987 if (tag & 2) {
3988 printk(KERN_ERR "cciss: controller message %02x:%02x failed\n",
3989 opcode, type);
3990 return -EIO;
3991 }
3992
3993 printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n",
3994 opcode, type);
3995 return 0;
3996}
3997
3998#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0)
3999#define cciss_noop(p) cciss_message(p, 3, 0)
4000
4001static __devinit int cciss_reset_msi(struct pci_dev *pdev)
4002{
4003/* the #defines are stolen from drivers/pci/msi.h. */
4004#define msi_control_reg(base) (base + PCI_MSI_FLAGS)
4005#define PCI_MSIX_FLAGS_ENABLE (1 << 15)
4006
4007 int pos;
4008 u16 control = 0;
4009
4010 pos = pci_find_capability(pdev, PCI_CAP_ID_MSI);
4011 if (pos) {
4012 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4013 if (control & PCI_MSI_FLAGS_ENABLE) {
4014 printk(KERN_INFO "cciss: resetting MSI\n");
4015 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE);
4016 }
4017 }
4018
4019 pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX);
4020 if (pos) {
4021 pci_read_config_word(pdev, msi_control_reg(pos), &control);
4022 if (control & PCI_MSIX_FLAGS_ENABLE) {
4023 printk(KERN_INFO "cciss: resetting MSI-X\n");
4024 pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE);
4025 }
4026 }
4027
4028 return 0;
4029}
4030
4031/* This does a hard reset of the controller using PCI power management
4032 * states. */
4033static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev)
4034{
4035 u16 pmcsr, saved_config_space[32];
4036 int i, pos;
4037
4038 printk(KERN_INFO "cciss: using PCI PM to reset controller\n");
4039
4040 /* This is very nearly the same thing as
4041
4042 pci_save_state(pci_dev);
4043 pci_set_power_state(pci_dev, PCI_D3hot);
4044 pci_set_power_state(pci_dev, PCI_D0);
4045 pci_restore_state(pci_dev);
4046
4047 but we can't use these nice canned kernel routines on
4048 kexec, because they also check the MSI/MSI-X state in PCI
4049 configuration space and do the wrong thing when it is
4050 set/cleared. Also, the pci_save/restore_state functions
4051 violate the ordering requirements for restoring the
4052 configuration space from the CCISS document (see the
4053 comment below). So we roll our own .... */
4054
4055 for (i = 0; i < 32; i++)
4056 pci_read_config_word(pdev, 2*i, &saved_config_space[i]);
4057
4058 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4059 if (pos == 0) {
4060 printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n");
4061 return -ENODEV;
4062 }
4063
4064 /* Quoting from the Open CISS Specification: "The Power
4065 * Management Control/Status Register (CSR) controls the power
4066 * state of the device. The normal operating state is D0,
4067 * CSR=00h. The software off state is D3, CSR=03h. To reset
4068 * the controller, place the interface device in D3 then to
4069 * D0, this causes a secondary PCI reset which will reset the
4070 * controller." */
4071
4072 /* enter the D3hot power management state */
4073 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4074 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4075 pmcsr |= PCI_D3hot;
4076 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4077
4078 schedule_timeout_uninterruptible(HZ >> 1);
4079
4080 /* enter the D0 power management state */
4081 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4082 pmcsr |= PCI_D0;
4083 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
4084
4085 schedule_timeout_uninterruptible(HZ >> 1);
4086
4087 /* Restore the PCI configuration space. The Open CISS
4088 * Specification says, "Restore the PCI Configuration
4089 * Registers, offsets 00h through 60h. It is important to
4090 * restore the command register, 16-bits at offset 04h,
4091 * last. Do not restore the configuration status register,
4092 * 16-bits at offset 06h." Note that the offset is 2*i. */
4093 for (i = 0; i < 32; i++) {
4094 if (i == 2 || i == 3)
4095 continue;
4096 pci_write_config_word(pdev, 2*i, saved_config_space[i]);
4097 }
4098 wmb();
4099 pci_write_config_word(pdev, 4, saved_config_space[2]);
4100
4101 return 0;
4102}
4103
1da177e4
LT		 4104/*
4105 * This is it. Find all the controllers and register them. I really hate
4106 * stealing all these major device numbers.
4107 * returns the number of block devices registered.
4108 */
4109static int __devinit cciss_init_one(struct pci_dev *pdev,
7c832835 4110 const struct pci_device_id *ent)
1da177e4 4111{
1da177e4 4112 int i;
799202cb 4113 int j = 0;
1da177e4 4114 int rc;
22bece00 4115 int dac, return_code;
212a5026 4116 InquiryData_struct *inq_buff;
1da177e4 4117
82eb03cf
CC		 4118 if (reset_devices) {
4119 /* Reset the controller with a PCI power-cycle */
4120 if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev))
4121 return -ENODEV;
4122
5e18cfd0
JA		 4123 /* Now try to get the controller to respond to a no-op. Some
4124 devices (notably the HP Smart Array 5i Controller) need
4125 up to 30 seconds to respond. */
5e4c91c8 4126 for (i=0; i<30; i++) {
82eb03cf
CC		 4127 if (cciss_noop(pdev) == 0)
4128 break;
5e4c91c8
JA		 4129
4130 schedule_timeout_uninterruptible(HZ);
4131 }
4132 if (i == 30) {
4133 printk(KERN_ERR "cciss: controller seems dead\n");
4134 return -EBUSY;
82eb03cf
CC		 4135 }
4136 }
4137
1da177e4 4138 i = alloc_cciss_hba();
7c832835 4139 if (i < 0)
e2019b58 4140 return -1;
1f8ef380
MM		 4141
4142 hba[i]->busy_initializing = 1;
8a3173de
JA		 4143 INIT_HLIST_HEAD(&hba[i]->cmpQ);
4144 INIT_HLIST_HEAD(&hba[i]->reqQ);
b368c9dd 4145 mutex_init(&hba[i]->busy_shutting_down);
1f8ef380 4146
1da177e4 4147 if (cciss_pci_init(hba[i], pdev) != 0)
7fe06326 4148 goto clean0;
1da177e4
LT		 4149
4150 sprintf(hba[i]->devname, "cciss%d", i);
4151 hba[i]->ctlr = i;
4152 hba[i]->pdev = pdev;
4153
b368c9dd
AP		 4154 init_completion(&hba[i]->scan_wait);
4155
7fe06326
AP		 4156 if (cciss_create_hba_sysfs_entry(hba[i]))
4157 goto clean0;
4158
1da177e4 4159 /* configure PCI DMA stuff */
6a35528a 4160 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 4161 dac = 1;
284901a9 4162 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 4163 dac = 0;
1da177e4 4164 else {
40aabb58 4165 printk(KERN_ERR "cciss: no suitable DMA available\n");
1da177e4
LT		 4166 goto clean1;
4167 }
4168
4169 /*
4170 * register with the major number, or get a dynamic major number
4171 * by passing 0 as argument. This is done for greater than
4172 * 8 controller support.
4173 */
4174 if (i < MAX_CTLR_ORIG)
564de74a 4175 hba[i]->major = COMPAQ_CISS_MAJOR + i;
1da177e4 4176 rc = register_blkdev(hba[i]->major, hba[i]->devname);
7c832835 4177 if (rc == -EBUSY || rc == -EINVAL) {
1da177e4 4178 printk(KERN_ERR
7c832835
BH		 4179 "cciss: Unable to get major number %d for %s "
4180 "on hba %d\n", hba[i]->major, hba[i]->devname, i);
1da177e4 4181 goto clean1;
7c832835 4182 } else {
1da177e4
LT		 4183 if (i >= MAX_CTLR_ORIG)
4184 hba[i]->major = rc;
4185 }
4186
4187 /* make sure the board interrupts are off */
4188 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_OFF);
7c832835 4189 if (request_irq(hba[i]->intr[SIMPLE_MODE_INT], do_cciss_intr,
69ab3912 4190 IRQF_DISABLED | IRQF_SHARED, hba[i]->devname, hba[i])) {
1da177e4 4191 printk(KERN_ERR "cciss: Unable to get irq %d for %s\n",
7c832835 4192 hba[i]->intr[SIMPLE_MODE_INT], hba[i]->devname);
1da177e4
LT		 4193 goto clean2;
4194 }
40aabb58
BH		 4195
4196 printk(KERN_INFO "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
7c832835
BH		 4197 hba[i]->devname, pdev->device, pci_name(pdev),
4198 hba[i]->intr[SIMPLE_MODE_INT], dac ? "" : " not");
4199
4200 hba[i]->cmd_pool_bits =
061837bc
JL		 4201 kmalloc(DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4202 * sizeof(unsigned long), GFP_KERNEL);
7c832835
BH		 4203 hba[i]->cmd_pool = (CommandList_struct *)
4204 pci_alloc_consistent(hba[i]->pdev,
f880632f 4205 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4206 &(hba[i]->cmd_pool_dhandle));
4207 hba[i]->errinfo_pool = (ErrorInfo_struct *)
4208 pci_alloc_consistent(hba[i]->pdev,
f880632f 4209 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4210 &(hba[i]->errinfo_pool_dhandle));
4211 if ((hba[i]->cmd_pool_bits == NULL)
4212 || (hba[i]->cmd_pool == NULL)
4213 || (hba[i]->errinfo_pool == NULL)) {
4214 printk(KERN_ERR "cciss: out of memory");
1da177e4
LT		 4215 goto clean4;
4216 }
1da177e4 4217 spin_lock_init(&hba[i]->lock);
1da177e4 4218
7c832835
BH		 4219 /* Initialize the pdev driver private data.
4220 have it point to hba[i]. */
1da177e4 4221 pci_set_drvdata(pdev, hba[i]);
7c832835
BH		 4222 /* command and error info recs zeroed out before
4223 they are used */
4224 memset(hba[i]->cmd_pool_bits, 0,
061837bc
JL		 4225 DIV_ROUND_UP(hba[i]->nr_cmds, BITS_PER_LONG)
4226 * sizeof(unsigned long));
1da177e4 4227
6ae5ce8e
MM		 4228 hba[i]->num_luns = 0;
4229 hba[i]->highest_lun = -1;
4230 for (j = 0; j < CISS_MAX_LUN; j++) {
4231 hba[i]->drv[j].raid_level = -1;
4232 hba[i]->drv[j].queue = NULL;
4233 hba[i]->gendisk[j] = NULL;
4234 }
1da177e4
LT		 4235
4236 cciss_scsi_setup(i);
4237
4238 /* Turn the interrupts on so we can service requests */
4239 hba[i]->access.set_intr_mask(hba[i], CCISS_INTR_ON);
4240
22bece00
MM		 4241 /* Get the firmware version */
4242 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
4243 if (inq_buff == NULL) {
4244 printk(KERN_ERR "cciss: out of memory\n");
4245 goto clean4;
4246 }
4247
4248 return_code = sendcmd_withirq(CISS_INQUIRY, i, inq_buff,
b57695fe 4249 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00
MM		 4250 if (return_code == IO_OK) {
4251 hba[i]->firm_ver[0] = inq_buff->data_byte[32];
4252 hba[i]->firm_ver[1] = inq_buff->data_byte[33];
4253 hba[i]->firm_ver[2] = inq_buff->data_byte[34];
4254 hba[i]->firm_ver[3] = inq_buff->data_byte[35];
4255 } else { /* send command failed */
4256 printk(KERN_WARNING "cciss: unable to determine firmware"
4257 " version of controller\n");
4258 }
212a5026 4259 kfree(inq_buff);
22bece00 4260
1da177e4 4261 cciss_procinit(i);
92c4231a
MM		 4262
4263 hba[i]->cciss_max_sectors = 2048;
4264
2d11d993 4265 rebuild_lun_table(hba[i], 1, 0);
b368c9dd 4266 hba[i]->busy_initializing = 0;
e2019b58 4267 return 1;
1da177e4 4268
6ae5ce8e 4269clean4:
6044ec88 4270 kfree(hba[i]->cmd_pool_bits);
7c832835 4271 if (hba[i]->cmd_pool)
1da177e4 4272 pci_free_consistent(hba[i]->pdev,
f880632f 4273 hba[i]->nr_cmds * sizeof(CommandList_struct),
7c832835
BH		 4274 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
4275 if (hba[i]->errinfo_pool)
1da177e4 4276 pci_free_consistent(hba[i]->pdev,
f880632f 4277 hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835
BH		 4278 hba[i]->errinfo_pool,
4279 hba[i]->errinfo_pool_dhandle);
fb86a35b 4280 free_irq(hba[i]->intr[SIMPLE_MODE_INT], hba[i]);
6ae5ce8e 4281clean2:
1da177e4 4282 unregister_blkdev(hba[i]->major, hba[i]->devname);
6ae5ce8e 4283clean1:
7fe06326
AP		 4284 cciss_destroy_hba_sysfs_entry(hba[i]);
4285clean0:
1f8ef380 4286 hba[i]->busy_initializing = 0;
799202cb
MM		 4287 /* cleanup any queues that may have been initialized */
4288 for (j=0; j <= hba[i]->highest_lun; j++){
4289 drive_info_struct *drv = &(hba[i]->drv[j]);
4290 if (drv->queue)
4291 blk_cleanup_queue(drv->queue);
4292 }
872225ca
MM		 4293 /*
4294 * Deliberately omit pci_disable_device(): it does something nasty to
4295 * Smart Array controllers that pci_enable_device does not undo
4296 */
799202cb 4297 pci_release_regions(pdev);
799202cb 4298 pci_set_drvdata(pdev, NULL);
61808c2b 4299 free_hba(i);
e2019b58 4300 return -1;
1da177e4
LT		 4301}
4302
e9ca75b5 4303static void cciss_shutdown(struct pci_dev *pdev)
1da177e4
LT		 4304{
4305 ctlr_info_t *tmp_ptr;
e9ca75b5 4306 int i;
1da177e4 4307 char flush_buf[4];
7c832835 4308 int return_code;
1da177e4 4309
e9ca75b5
GB		 4310 tmp_ptr = pci_get_drvdata(pdev);
4311 if (tmp_ptr == NULL)
4312 return;
4313 i = tmp_ptr->ctlr;
4314 if (hba[i] == NULL)
4315 return;
4316
4317 /* Turn board interrupts off and send the flush cache command */
4318 /* sendcmd will turn off interrupt, and send the flush...
4319 * To write all data in the battery backed cache to disks */
4320 memset(flush_buf, 0, 4);
b57695fe 4321 return_code = sendcmd(CCISS_CACHE_FLUSH, i, flush_buf, 4, 0,
4322 CTLR_LUNID, TYPE_CMD);
e9ca75b5
GB		 4323 if (return_code == IO_OK) {
4324 printk(KERN_INFO "Completed flushing cache on controller %d\n", i);
4325 } else {
4326 printk(KERN_WARNING "Error flushing cache on controller %d\n", i);
4327 }
4328 free_irq(hba[i]->intr[2], hba[i]);
4329}
4330
4331static void __devexit cciss_remove_one(struct pci_dev *pdev)
4332{
4333 ctlr_info_t *tmp_ptr;
4334 int i, j;
4335
7c832835
BH		 4336 if (pci_get_drvdata(pdev) == NULL) {
4337 printk(KERN_ERR "cciss: Unable to remove device \n");
1da177e4
LT		 4338 return;
4339 }
0a9279cc 4340
1da177e4
LT		 4341 tmp_ptr = pci_get_drvdata(pdev);
4342 i = tmp_ptr->ctlr;
7c832835 4343 if (hba[i] == NULL) {
1da177e4 4344 printk(KERN_ERR "cciss: device appears to "
7c832835 4345 "already be removed \n");
1da177e4
LT		 4346 return;
4347 }
b6550777 4348
b368c9dd 4349 mutex_lock(&hba[i]->busy_shutting_down);
0a9279cc 4350
b368c9dd 4351 remove_from_scan_list(hba[i]);
b6550777
BH		 4352 remove_proc_entry(hba[i]->devname, proc_cciss);
4353 unregister_blkdev(hba[i]->major, hba[i]->devname);
4354
4355 /* remove it from the disk list */
4356 for (j = 0; j < CISS_MAX_LUN; j++) {
4357 struct gendisk *disk = hba[i]->gendisk[j];
4358 if (disk) {
165125e1 4359 struct request_queue *q = disk->queue;
b6550777 4360
097d0264 4361 if (disk->flags & GENHD_FL_UP) {
8ce51966 4362 cciss_destroy_ld_sysfs_entry(hba[i], j, 1);
b6550777 4363 del_gendisk(disk);
097d0264 4364 }
b6550777
BH		 4365 if (q)
4366 blk_cleanup_queue(q);
4367 }
4368 }
4369
ba198efb 4370#ifdef CONFIG_CISS_SCSI_TAPE
b6550777 4371 cciss_unregister_scsi(i); /* unhook from SCSI subsystem */
ba198efb 4372#endif
b6550777 4373
e9ca75b5 4374 cciss_shutdown(pdev);
fb86a35b
MM		 4375
4376#ifdef CONFIG_PCI_MSI
7c832835
BH		 4377 if (hba[i]->msix_vector)
4378 pci_disable_msix(hba[i]->pdev);
4379 else if (hba[i]->msi_vector)
4380 pci_disable_msi(hba[i]->pdev);
4381#endif /* CONFIG_PCI_MSI */
fb86a35b 4382
1da177e4 4383 iounmap(hba[i]->vaddr);
1da177e4 4384
f880632f 4385 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(CommandList_struct),
1da177e4 4386 hba[i]->cmd_pool, hba[i]->cmd_pool_dhandle);
f880632f 4387 pci_free_consistent(hba[i]->pdev, hba[i]->nr_cmds * sizeof(ErrorInfo_struct),
7c832835 4388 hba[i]->errinfo_pool, hba[i]->errinfo_pool_dhandle);
1da177e4 4389 kfree(hba[i]->cmd_pool_bits);
872225ca
MM		 4390 /*
4391 * Deliberately omit pci_disable_device(): it does something nasty to
4392 * Smart Array controllers that pci_enable_device does not undo
4393 */
7c832835 4394 pci_release_regions(pdev);
4e570309 4395 pci_set_drvdata(pdev, NULL);
7fe06326 4396 cciss_destroy_hba_sysfs_entry(hba[i]);
b368c9dd 4397 mutex_unlock(&hba[i]->busy_shutting_down);
1da177e4 4398 free_hba(i);
7c832835 4399}
1da177e4
LT		 4400
4401static struct pci_driver cciss_pci_driver = {
7c832835
BH		 4402 .name = "cciss",
4403 .probe = cciss_init_one,
4404 .remove = __devexit_p(cciss_remove_one),
4405 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 4406 .shutdown = cciss_shutdown,
1da177e4
LT		 4407};
4408
4409/*
4410 * This is it. Register the PCI driver information for the cards we control
7c832835 4411 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 4412 */
4413static int __init cciss_init(void)
4414{
7fe06326
AP		 4415 int err;
4416
10cbda97
JA		 4417 /*
4418 * The hardware requires that commands are aligned on a 64-bit
4419 * boundary. Given that we use pci_alloc_consistent() to allocate an
4420 * array of them, the size must be a multiple of 8 bytes.
4421 */
4422 BUILD_BUG_ON(sizeof(CommandList_struct) % 8);
4423
1da177e4
LT		 4424 printk(KERN_INFO DRIVER_NAME "\n");
4425
7fe06326
AP		 4426 err = bus_register(&cciss_bus_type);
4427 if (err)
4428 return err;
4429
b368c9dd
AP		 4430 /* Start the scan thread */
4431 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
4432 if (IS_ERR(cciss_scan_thread)) {
4433 err = PTR_ERR(cciss_scan_thread);
4434 goto err_bus_unregister;
4435 }
4436
1da177e4 4437 /* Register for our PCI devices */
7fe06326
AP		 4438 err = pci_register_driver(&cciss_pci_driver);
4439 if (err)
b368c9dd 4440 goto err_thread_stop;
7fe06326 4441
617e1344 4442 return err;
7fe06326 4443
b368c9dd
AP		 4444err_thread_stop:
4445 kthread_stop(cciss_scan_thread);
4446err_bus_unregister:
7fe06326 4447 bus_unregister(&cciss_bus_type);
b368c9dd 4448
7fe06326 4449 return err;
1da177e4
LT		 4450}
4451
4452static void __exit cciss_cleanup(void)
4453{
4454 int i;
4455
4456 pci_unregister_driver(&cciss_pci_driver);
4457 /* double check that all controller entrys have been removed */
7c832835
BH		 4458 for (i = 0; i < MAX_CTLR; i++) {
4459 if (hba[i] != NULL) {
1da177e4 4460 printk(KERN_WARNING "cciss: had to remove"
7c832835 4461 " controller %d\n", i);
1da177e4
LT		 4462 cciss_remove_one(hba[i]->pdev);
4463 }
4464 }
b368c9dd 4465 kthread_stop(cciss_scan_thread);
928b4d8c 4466 remove_proc_entry("driver/cciss", NULL);
7fe06326 4467 bus_unregister(&cciss_bus_type);
1da177e4
LT		 4468}
4469
33079b21
MM		 4470static void fail_all_cmds(unsigned long ctlr)
4471{
4472 /* If we get here, the board is apparently dead. */
4473 ctlr_info_t *h = hba[ctlr];
4474 CommandList_struct *c;
4475 unsigned long flags;
4476
4477 printk(KERN_WARNING "cciss%d: controller not responding.\n", h->ctlr);
7c832835 4478 h->alive = 0; /* the controller apparently died... */
33079b21
MM		 4479
4480 spin_lock_irqsave(CCISS_LOCK(ctlr), flags);
4481
7c832835 4482 pci_disable_device(h->pdev); /* Make sure it is really dead. */
33079b21
MM		 4483
4484 /* move everything off the request queue onto the completed queue */
8a3173de
JA		 4485 while (!hlist_empty(&h->reqQ)) {
4486 c = hlist_entry(h->reqQ.first, CommandList_struct, list);
4487 removeQ(c);
33079b21 4488 h->Qdepth--;
8a3173de 4489 addQ(&h->cmpQ, c);
33079b21
MM		 4490 }
4491
4492 /* Now, fail everything on the completed queue with a HW error */
8a3173de
JA		 4493 while (!hlist_empty(&h->cmpQ)) {
4494 c = hlist_entry(h->cmpQ.first, CommandList_struct, list);
4495 removeQ(c);
b59e64d0
HR		 4496 if (c->cmd_type != CMD_MSG_STALE)
4497 c->err_info->CommandStatus = CMD_HARDWARE_ERR;
33079b21
MM		 4498 if (c->cmd_type == CMD_RWREQ) {
4499 complete_command(h, c, 0);
4500 } else if (c->cmd_type == CMD_IOCTL_PEND)
4501 complete(c->waiting);
4502#ifdef CONFIG_CISS_SCSI_TAPE
7c832835
BH		 4503 else if (c->cmd_type == CMD_SCSI)
4504 complete_scsi_command(c, 0, 0);
33079b21
MM		 4505#endif
4506 }
4507 spin_unlock_irqrestore(CCISS_LOCK(ctlr), flags);
4508 return;
4509}
4510
1da177e4
LT		 4511module_init(cciss_init);
4512module_exit(cciss_cleanup);
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